Extension Line BlueprintCutting Plane Line A cutting plane is represented on a drawing by a cutting plane line. Architects use extension lines in their blueprints. It is usually drawn as a solid line (although some architects draw it as a dashed line) and conveys where the door will swing. Hi all, I'm having trouble creating a dimension that comes from two extension lines. Blueprint Reading For Welders 9th Edition Textbook. Blueprints typically include various types of lines to represent schematic purposes, such as walls, door frames, appliance exteriors, dimensions and range of motion. Each type of line has a very precise symbolic meaning. RE: Creating a datum with extension line in NX 8. DIMENSION LINE – Thin. What is extension line in engineering drawing? – TipsFolder. You can reference multiple parallel edges or faces with one leader. CONSTRUCTION LINE – Very light and thin line use to construct layout work. Dimension Extension Lines. Leaders for notes should be straight, not curved, and point to the center of circular views of holes wherever possible. DIMENSION LINE – Thin and dark lines use to show the size (span) of an object with a numeric value. com Tek-Tips Make: Projects Engineering. A leader line in engineering drawing is a straight-line guide that is used to connect dimensions or notes to an object in the drawing. The dimension lines terminate at the respected extension lines. Use the scope property on this resource to set the scope for this resource. Extension line: This line indicates the endpoints of a dimension line. Dimension Line: fine lines with arrowheads, unbroken except where the dimension is placed that show distance given by the dimensions. You can specify in the Dimension PropertyManager that extension lines break when they cross other extension lines and specify in Tools > Options > Document Properties > Dimensions that the lines break only around dimension arrows. This thread is similar to thread561-364185: how do you move a datum leader/extension line side ways, but it doesn't work with "shift + drag" I have a datum symbol with leader to an edge. Solved: Dimensioning to extension lines. Extension lines provide a means of displaying a measurement without placing the dimension on the part. Extension lines continue or extend from the surface of the object and establish the size of the dimension. short manual for use from the command line. First of all, extension lines must start from the 1. When the command line is active the "Command:" (left of where input appears) turns blue. Extension lines are the lines that extend the Dimension outside the perimeter of the measured entity, assuming that dimensioning is to take place outside of these perimeter constraints. You can specify in the Dimension PropertyManager that extension lines break when they cross other extension lines and specify in Tools > Options > Document Properties > Dimensions that the lines break only around dimension arrows. Blueprint Dimensions and Notes Term 1 / 8 What feature would you add if a part's dimension lines are too close for the dimension to be read easily? Click the card to flip 👆 Definition 1 / 8 Extension line. What Different Line Types in Architecture & Design Drawings. The blueprints resource type is an extension resource, which means you can apply it to another resource. Right-click a dimension line or extension line and select Hide Dimension Line or Hide Extension Line. Extension lines, also known as line conventions, are thin lines that extend from the object outline to a point outside the image area. How can I move the "A" WITH LEADER upward and it create automatically an extension line in NX8. A dimension line indicates the size of the measurement. Lines in technical drawings are part of a specialized graphic language that is standardized throughout industry. From JIG SUPPORT drawing the lines are identified as follows: A. Leader Line Leaders are more thin lines used to point to an area of a drawing requiring a note for explanation. You can hide and show dimension lines and extension lines. In the same vein, what exactly is a Dimension line in an engineering drawing? Definitions and Dimensions. Article In this article, manipulating SOLIDWORKS extension lines after being added by dimensions is examined. A center line may be extended and used as an extension line, in which case it is still drawn like a center line. You can hide or show hidden dimension lines and extension lines. Click the card to flip 👆 Flashcards Learn Test Match Created by Famos434 Terms in this set (8). Extension lines which are added using thin lines determine the extent of a dimension. What purpose do extension lines serve? Move a dimension line away. Usually, the arrowhead must include angles of a minimum of 15°. Line sub-dimensions up with each other. Select the dimension you created (whatever the type). Dimension A ? has the benefits of being able to provide a horizontal and vertical straightedge and be rotated and locked at any angle. A blueprint is a type of paper-based reproduction usually of a technical drawing documenting an object, an architecture or engineering design. These are the general standards of the extension lines. Right-click on extension line to hide Right-click on one side of dimension line to hide Both are hidden now. ) Extension line. double click drawn dimension then carefully select only left (or right) extension line (need to click on line, not white space) adjust [a] value by drag blue point change extension line’s edge arrow style by selecting ‘Shape Styles’ dialog (double click drawn dimension, selected dimension line, dimension value, right/left extension line). How To Read Blueprints in 4 Steps (Types, Lines and FAQs). 40 1/2" D 9/16"D Leaders (Thin) AIDT-Blueprint Reading - 10/22/2009 7 8. Line weight is the thickness of the line. and purpose of a line in a drawing is the first step in becoming a good blueprint reader. Blueprint Dimensions and Notes Term 1 / 8 What feature would you add if a part's dimension lines are too close for the dimension to be read easily? Click the card to flip 👆 Definition 1 / 8 Extension line. Extension lines provide a means of displaying a measurement without placing the dimension on the part. So now when you press a key you are entering commands. Blueprint Alphabet lines are used in combination with each other on all the prints in the ____ Series. Lines Used in Architectural Drawings and their Importance. Go to the General tab in dimension properties. The dimension may be numeral in feet, millimeters or inches that will be placed above and near the center of the solid dimension of the line. Dimensioning – Its Types, System, Principles. You can also right-click on this dimension and then choose Properties from the contextual menu. Leader Line Leaders. It is shown that the extension lines could be treated as a separate entity in drawings and we can even decide to show or hide them. Some settings existed under Tools > Options dedicated only for extension lines. You can set individual extension lines to display as centerline style. Use the eraser tool to erase parts of your drawing. To show hidden lines, right-click the dimension or a visible line and select Show Dimension Lines or Show Extension Lines. Anyone have a lisp routine below: - Detect all dimension's extension line is overlapped - Move those point to near dimension's base line such as 100 mm Thanks all in advance for any support. Leader lines can have multiple segments and you can use one annotation to reference multiple faces and edges. Line drawing layout is a type of computer graphics layout that uses straight lines to represent objects, using coordinate points and vectors. tv Resources Log In Join Close Box Join Eng-Tips ® Today! Join your peers on the Internet's largest technical engineering professional community. Right-click a dimension line or extension line and select Hide Dimension Line or Hide Extension Line. com%2fcareer-advice%2fcareer-development%2fhow-to-read-blueprints/RK=2/RS=R4TLgoOkbv. beginning and the end ? lines show the size of an object. Here's Why Members Love Eng-Tips Forums:. Figure 1-2 provides examples of each type of line in the Alphabet of Extension Line 3. and purpose of a line in a drawing is the first step in becoming a good blueprint reader. List of building systems •the building envelope •Building sure •interior systems •roofing systems •mechanical systems •plumbing systems •electrical & lightning systems •structural systems. The associated panel is displayed. SDETERS (Agricultural) 4 Feb 14 11:37. com">Feature Control Frame. Dimensional areas are defined by extension lines. Extension line — a thin, solid line perpendicular to a dimension line, indicating which feature is associated with the dimension. And beyond the dimension line, extension lines must extend 3mm (1/8"). Avoid crossing dimension lines with leader lines. An extension line in drawing is a line that is used to extend the view of an object in a drawing. Drawing">The Alphabet of Lines in Technical Drawing. Where items in blueprints can be busy and complex, an extension line is an easy way to interpret the basis of the item. Extension lines are also thin lines, showing the limits of dimensions. Use the highlighter tool to highlight lines of text. (Extension Line or no line as shown) Geometric Symbol – This is where your geometric control is specified. See our page on GD&T symbols for a description of each symbol. Leaders are more thin lines used to point to an area of a drawing requiring a note for explanation. Where space is limited, extension lines may be drawn at an angle. Blueprints Lvl I Lesson 1: The Fundamentals of Blueprint ">Blueprints Lvl I Lesson 1: The Fundamentals of Blueprint. What is extension line in engineering drawing?. A center line may be extended and used as an extension line, in which case it is still drawn like a center line. SOLIDWORKS: Cleaning Up Drawings by Adjusting Dimension Extension Lines. What statement about blueprints is true?. Permissible for extension lines to cross each other. Create dimensions Create dimension Fixes and tolerances Move a dimension Orient dimensions Projected dimension reference points Modify dimensions Modify dimension properties Modify dimension text Modify dimension lines Modify dimension arrows and lines Modify a dimension vertex Convert thread dimensions Extend an external base point. Extension lines provide a means of displaying a measurement without placing the dimension on the part. Section line 7. Then Old down the shift key click and drag it where you want it. Similarly, you can hide these extension lines. Line sub-dimensions up with each other. Extension line: a line that touches and is used with dimension lines. Right-click on the undesired extension line and select "Hide Extension Line". The line used in Q is referred as a leader line it contains dot at the end of the straight line which indicates reference is made to a surface area. 2H or 4H pencil is used for this purpose. Visible gap — there should be a visible gap of 1. It connects the extension lines with arrow heads and has a space for a measurement number. Lines may be thick, straight or curved, dashed or solid, depending on their signification. 0 Moving datum symbol along to an extension line in drawing…. The Alphabet of Lines in Technical Drawing. Their basic purpose is to show circular/cylindrical features in a drawing, which are found in abundance in mechanical parts. How are angled surfaces dimensioned? Surface. Lines Used in Architectural Drawings and their Importance">Lines Used in Architectural Drawings and their Importance. Extension lines are also thin lines, showing the limits of dimensions. Extension Line: Extension lines are fine lines that extend from the object with slight break between the show dimensioning points. Phantom line Word Bank Object line Hidden line Center line Phantom line Break line Extension line Cutting plane Section line Dimension line 3. Extension lines are straight and mark the ? of an object. Extension lines are used to refer a dimension to a particular feature and are usually drawn perpendicular to the associated dimension line. A surface cut by the saw in the drawing above is a cutting plane. Extension lines continue or extend from the surface of the object and establish the size of the dimension. The construction line is extended slightly beyond the point intersection. Extension line of a Datum Feature Symbol should ">CS298710. Select an option from the Short extension line list: Save your setting in a properties file for later use. CONSTRUCTION LINE – Very light and thin line use to construct layout work. Styles: Sets the LineStyle for Extension line 1 and Extension line 2. Which of the following lines visually connect a dimension line to the feature it indicates? Extension line What is indicated by a feature with a tighter tolerance than the rest of a print's dimensions? The tightest tolerance on a blueprint indicates a feature that: Affects a part's fit or function. They are short, bold lines perpendicular to the associated dimension line. Set the dimension extension line length. Do not add it to the dimension line. Extension line blueprint. Extension lines, also known as line conventions, are thin lines that extend from the object outline to a point outside the image area. In the Properties dialog box that appears, click the Extension Line tab. The four basic steps to sketch an object are: I. To set extension lines to display as centerline style, right-click the extension line. Extension lines, also known as line conventions, are thin lines that extend from the object outline to a point outside the image area. Make sure you understand the use of the viewing plane line to show an additional view. All of the red "bent arrow" lines with notes are the leaders. Do not add it to the dimension line. See Set scope on extension resources in Bicep. Open a drawing and double-click a dimension. Center line 8. 6 Dimensioning Numerals Dimensions Extension Lines Arrowheads Dimension Figures Isometric Dimensioning Orthographic Dimensioning If a drawing is to be complete, so that the object represented by the drawing can be made as intended by the designer, it must tell two complete stories. Select the tool marked #2 to constrain the end of the line you want to extend, to the line you want to extend it to. Drawing (PDF) – What Is Piping">Types of Lines in Engineering Drawing (PDF) – What Is Piping. The following image shows how one of the extension lines and also one side of the dimension line is hidden. Know it may take a little work if the edge that you are looking at is a Arc. Sectional Views – Basic Blueprint Reading">Sectional Views – Basic Blueprint Reading. Then Old down the shift key click and drag it. Modify dimension lines The work area (user interface) Augmented Reality Create and modify 3D models Modeling with advanced techniques Organize parts and assemblies Analyze a design Render a design Adjust system settings Glossary Create drawings from models (Creo Elements/Direct Annotation) Overview Turn 3D models into 2D drawings. Create dimensions Create dimension Fixes and tolerances Move a dimension Orient dimensions Projected dimension reference points Modify dimensions Modify dimension properties Modify dimension text Modify dimension lines Modify dimension arrows and lines Modify a dimension vertex Convert thread dimensions Extend an external base point. Extension lines continue or extend from the surface of the object and establish the size of the dimension. It connects the extension lines with arrow heads and has a space for a measurement number. They can be set to display as the dashed styled line that matches your settings for "centerline". Small dimensions create the need to break the dimension line into pieces. The following chart shows technical drawing lines that describe a piece of machinery with a swinging arm. Dimensioning – Basic Blueprint Reading. Correct usage of this "alphabet of lines" is essential whether you use traditional drafting methods or CAD. In sketching arcs, circles, and ellipses, it is best to use ? lines before drawing the actual shape. Extension Line Properties">Editing Dimension Extension Line Properties. Extension and Dimension Lines A horizontal line with an arrow on one end pointing toward a vertical line with no arrows. Extension Line: Extension lines are fine lines that extend from the object with slight break between the show dimensioning points. They are preferably drawn at a 45° angles. The blueprints resource type can be deployed with operations that target:. These thin, unbroken lines are started about one. Professional drawers, draftsmen and architects, among many other technical professionals, use extension lines to present a. Extension lines are also thin lines, showing the limits of dimensions. Professional drawers, draftsmen and architects, among many other technical professionals, use extension lines to present a clear-cut means for identifying key areas in blueprints, drafts and product manuals. You can also adjust the extension line length using advanced options. My attached drawing have many dimension with some of that have extension line is overlapped with other objects. Dimensions may be placed on a part if it is not practical to add extension lines. Actually, it is an imaginary cutting plane taken through the object, since the object is imagined as being cut through at a desired location. basically, it's a dimension that would be available if click the line that would intersect at the virtual sharp. Dimension line / extension line basic blueprint reading dimension lines are used to show the extent of a dimension. OBJECT OR VISIBLE LINES – Thick dark line use to show outline of object, visible edges and surfaces. Diameter Symbol (if required) – If the geometric control is a diametrical tolerance, then the diameter symbol (Ø) will be in front of the tolerance value. Extension Lines; Arrowheads; Dimension Figures; Isometric Dimensioning; Orthographic Dimensioning; If a drawing is to be complete, so that the object represented by the drawing can be made as intended by the designer, it must tell two complete stories. DIMENSION LINES A dimension line indicates the size of the measurement. When extension lines cross other extension lines or visible object lines, no break in either line should be made. In the same vein, what exactly is a Dimension line in an engineering drawing? Definitions and Dimensions. o z dimension i extension line--"inbreak line. Arrowheads: Arrowheads are used to indicate the dimension line. Blueprint unit 9 Flashcards. The Arrowhead may be open or close or closed and filled. We have attempted to utilize some of the elements in the API in a macro, but we hit a wall (the properties that control these extension lines appear to be read only). 1: Types of Lines in Engineering Drawing Leader Lines. Extension lines, on the other hand, are seen simply as extensions of these items. Break Lines There are long and short break lines (see Figure 1-10). Extension lines continue or extend from the surface of the object and establish the size of the dimension. It is shown that the extension lines could be treated as a separate entity in drawings and we can even decide to show or hide them. tv Resources Log In Join Close Box Join Eng-Tips ® Today! Join your. Select the tool marked #2 to constrain the end of the line you want to extend, to the line you want to extend it to. You can specify in the Dimension PropertyManager that extension lines break when they cross other extension lines and specify in Tools > Options > Document Properties > Dimensions that the lines break only around dimension arrows. Back to top Corresponding textbook Blueprint Reading for Welders | 9th Edition ISBN-13: 9781305142923 ISBN: 1305142926 Authors: A E Bennett, Louis J Siy Rent | Buy Alternate ISBN: 9781133605782. Use the text tool to add text to the website. They are short, bold lines perpendicular to the associated dimension line. Extension and dimension. Dimension lines present certain measurements of and between items in a drawing. You can also adjust the extension line length using advanced options. (Extension Line or no line as shown) Geometric Symbol – This is where your geometric control is specified. Extension lines which are added using thin lines determine the extent of a dimension. Usually, the dimension line meets the extension line at right angles. In this article, manipulating SOLIDWORKS extension lines after being added by dimensions is examined. basically, it's a dimension that would be available if click the line that. Long break line 9. Blueprint Reading for Welders. The blueprints resource type is an extension resource, which means you can apply it to another resource. Creating a datum with extension line in NX 8. It is recommended that you draw your. Symbols & Abbreviations Welding Symbols - The Basic. They don't touch the dimension line, but only indicate where it ends. Extension and dimension lines 5. Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. The dimension lines terminate at the respected extension lines. Extension lines are also thin lines, showing the limits of dimensions. How extension lines are used in blueprint reading. The construction line is extended slightly beyond the point intersection. 5 - Siemens: UG/NX - Eng-Tips Engineering. Creating a datum with extension line in NX 8. The dimension lines terminate at the respected extension lines. To show hidden lines, right-click the dimension or a visible line and select Show Dimension Lines or Show Extension Lines. Weight: Sets the extension line LineWeight. blueprint practice sheet1a 2. (c) Leader lines are used to direct an expression, in note form, to the intended place on the drawing. An extension line in drawing is a line that is used to extend the view of an object in a drawing. What Are Extension Lines in Technical Drawing?. It is used to clarify the meaning of labels, dimensions, and notes that are. Dimension line arrowheads touch extension lines. 5mm (1/16") apart from dimensioned entities of parts and products in technical drawing. Dimension line arrowheads touch extension lines. Once the dimension is highlighted now place your cursor just a little below where you wish the gap to be created (actually this will be the bottom of the gap if the extension line is vertical) and select. When extension lines cross extension lines or visible lines, no break in either should be made. Permissible for extension lines to cross each other. The following image shows how one of the extension lines and also one side. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. The lines are defined as follows: (a) Extension lines are used to indicate the extension of an edge or point to a location outside the part outline. DVhFrasXvPcBFjJY-" referrerpolicy="origin" target="_blank">See full list on indeed. Equipment line: a light, continuous, unbroken line used to show the location of equipment, such as transformers, panels. Blueprints Lvl I Lesson 1: The Fundamentals of Blueprint …. basically, it's a dimension that would be available if the radii weren't present, see picture below:- Does anyone know how to create the extension lines and apply the correct vertical dimension?. Select the Edit-> Properties command. Extension lines are used to refer a dimension to a particular feature and are usually drawn perpendicular to the associated dimension line. To change thickness, use the size slider. Solved: Hi all, I'm having trouble creating a dimension that comes from two extension lines. OBJECT OR VISIBLE LINES – Thick dark line use to show outline of object, visible edges and surfaces. Manipulating SOLIDWORKS Extension Lines in your Drawings. Use the line tool to draw straight lines. Center lines should generally not extend from view to view. , In blueprints, a ? line is used to visually cut out a. The following chart shows technical drawing lines that describe a piece of machinery with a swinging arm. You can hide or show hidden dimension lines and extension lines. Do's and don'ts to dimensioning. Pick the end point of the first line, and the line you want it collinear to. Extension lines are use to extend a point from an object. extension line in engineering drawing? – TipsFolder. double click drawn dimension then carefully select only left (or right) extension line (need to click on line, not white space) adjust [a] value by drag blue point change extension line’s edge arrow style by selecting ‘Shape Styles’ dialog (double click drawn dimension, selected dimension line, dimension value, right/left extension line). Figure 3-7 These are common line types used in drawings to describe objects, hidden conditions, and important relationships between components and space. The Language of Lines - Basic Blueprint Reading 2 The Language of Lines OBJECTLINE HIDDEN LINE SECTION LINE CENTER LINE DIMENSION LINE EXTENSION LINE LEADER LINE CUTTING PLANE LINE BREAK LINES PHANTOM LINES BORDER LINE You have heard the saying, "A picture is worth a thousand words". com/_ylt=AwriitZD9GFk3GI29YRXNyoA;_ylu=Y29sbwNiZjEEcG9zAzUEdnRpZAMEc2VjA3Ny/RV=2/RE=1684169924/RO=10/RU=https%3a%2f%2fwww. Extension lines usually extend beyond the object being drawn and indicate the start and end of the object’s outline. Common examples of such features include bolt holes, pins, discs, etc. How extension lines are used in blueprint reading. Architects use extension lines in their blueprints. Figure 1-2 provides examples of each type of line in the Alphabet of Extension Line. This line extends out from the edge or the point at which the dimension is to be determined. The line used in Q is referred as a leader line it contains dot at the end of the straight line which indicates reference is made to a surface area. Then I would suspect that you're trying to dimension a part sketch rather than a drawing view. Make sure you understand the use of the cutting plane line to show the section. Extension lines are the lines that extend the Dimension outside the perimeter of the measured entity, assuming that dimensioning is to take place outside of these perimeter constraints. Usually terminates with arrowheads or tick markings. The purpose of an extension line is to provide clarity or give more information about an element in the drawing. I have to redraw an older drawing. They do not touch the object lines and extend slightly past the dimension line. How extension lines are used in blueprint reading. There is also a button on the trim tool that will allow you to create a corner from tow perpendicular lines (a zero radius fillet). Extension line of a Datum Feature Symbol should have a short visible gap on drawing Datum Feature Symbol does not have a gap when extended past surface Witness line of Datum Feature Symbol does not show gap between geometric line and edge of the part Wrong display of the witness line for DFS and Gtol. In sketching arcs, circles, and ellipses, it is best to use ? lines before drawing the actual shape. Extension line — a thin, solid line perpendicular to a dimension line, indicating which feature is associated with the dimension. Long Break Line A thin, jagged line. Study with Quizlet and memorize flashcards containing terms like ? lines are thick lines that define solid objects or boundaries. It's easy to join and it's free. Dimension Line: This type of drawing is also called an orthographic projection. Solved: Hi all, I'm having trouble creating a dimension that comes from two extension lines. If dimension and extension lines become crowded or overlapped on the drawing, you can adjust the lines to preserve the clarity of the dimensioning. (b) Dimension lines show the direction and extent of dimension. You can hide and show dimension lines and extension lines. Identify the ten lines found on the drawing below by writing the correct name of each in the space provided. Dimension lines do not cross each other. Small dimensions create the need to break the dimension line into pieces. Sometimes, extension lines are used to demonstrate the extension of a surface to a theoretical intersection. Right-click a dimension line or extension line and select Hide Dimension Line or Hide Extension Line. This lets you identify when an extension line extends from a hole. Abbreviations and Symbols. The Language of Lines | 7. basically, it's a dimension that would be available if the radii weren't present, see picture below:- Does anyone know how to create the extension lines and apply the correct vertical dimension? Any help would be much appreciated. Lines in technical drawings are part of a specialized graphic language that is standardized throughout industry. Using the Command line You can press the Space-bar or [Ctrl + M] to activate the command line. The leader line should terminate in an arrowhead or dot. To show hidden lines, right-click the dimension or a visible line and select Show Dimension Lines or Show Extension Lines. com">What is extension line in engineering drawing? – TipsFolder. Dimensional areas are defined by extension lines. Hi all, I'm having trouble creating a dimension that comes from two extension lines. Like other aspects of drafting, there's a set of symbols for welding to. light layout The hand-held device used to draw circles is called a (n) ?. Centerlines are one of the most frequently used tools in engineering drawing. Extension lines are use to. Add it to the actual edge and or surface of the part the creates the "A" datum. object The shape of an object is described on a drawing by thick (dark) lines known as visible edge or ____ lines. Extension line blueprint. Creating a datum with extension line in NX 8. Technical Drawing Standards: Leader Lines. To change the color of the marker, click on the color selecting box. Types of Lines in Engineering Drawing (PDF) – What Is Piping. Extension line: This line indicates the endpoints of a dimension line. Shorten Dimension's Extension Lines in Drawing We need to shorten the extension lines of our drawings through the API in a Macro. This lets you identify when an extension line. (a) Extension lines are used to indicate the extension of an edge or point to a location outside the part outline. Color: Sets the extension line LineColor. This is done with a right-click on the extension line and choosing "Set Extension Line as Centerline". Extension lines on a drawing are fine, dark, solid lines that extend outward from a point on a drawing to which a dimension refers. Extension Line: Such lines which are drawn extending from the ends of a part of a drawing so that the dimension can be written in between them are called extension lines. Blueprint Line Types Read each line type in the column titled “type of line” Examine each line type under the column titled “appearance” Read the description for each type of line in the “description” column. Extension Lines; Arrowheads; Dimension Figures; Isometric Dimensioning; Orthographic Dimensioning; If a drawing is to be complete, so that the object represented by the drawing can be made as intended by the designer, it must tell two complete stories. Hidden Line A thin, dashed line Leaders A thin, solid line that bends at a 45 degree angle with an arrow that points toward the object in the blueprint. Standard Practices-Extension lines. (b) Dimension lines show the direction and extent of dimension. This termination is represented by means of slashes, dots or arrowheads. You can set individual extension lines to display as.