In this article I will show you how you can change the line type in AutoCAD.

We use different types of lines to denote the following groups of objects in the drawing: center lines (dash-dotted type), invisible lines (dashed type), visible lines (solid type), fences (solid line with circles). There can be an infinite number of line types, depending on how you decide to configure the file in which you are working.

The list of line types is located on the ribbon in the “Properties” command group. In the same list, you can select the “other” item to add new line types from other files to the drawing. When you select an object (how to select an object?), in the “properties” command group, the corresponding list will display the line type that this object assigned To change the line type of an object, just select another item from the list.

If you select any list item without selecting objects, then this type lines will be set to current and all subsequent objects that you draw will have the line type you selected.

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Computer-aided design systems - CAD

Working in AutoCAD
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6.3.3. Setting line scale

Dashed lines are displayed using what is called scaling factor, which defaults to 1. AutoCAD supports both a global scaling factor, which affects the display of all dash lines in a drawing, and a local scaling factor for each individual object. The latter is also 1 by default, but when it changes for an object, the effective scaling factor for that object is determined by multiplying the global factor by the user-specified local factor value. This approach allows you to flexibly customize all the dashed lines of the drawing.

Since in our case there is no need to change the local scaling factor, we will simply change the global factor for all dash lines of the drawing at once, increasing the length of the strokes and the spaces between them by 5 times.

1. Enter the command in the command window lscale or simply lmsh.

2. AutoCAD will prompt you to enter a new value or, by pressing Enter, to leave the current value unchanged. Enter 5.

3. Contour view system unit will change as the strokes become distinguishable (Fig. 6.28). If you are not satisfied with the selected scale factor, you can try setting a different value (for example, 4, 4.5 or 5.5).

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As you know, in AutoCAD there is a concept line type scales. Linetype scale is a scale factor that is applied to a line's drawing pattern and allows you to change the length of strokes and other objects that make up the line.

In other words, by decreasing the scale of the line type, we reduce the length of the strokes (more of them fit into a segment of finite length), while increasing the scale, we increase the length of the stroke (fewer of them fit into a segment of finite length).

I think everyone has more than once encountered a situation when you need to apply a dashed line to a small object. As a result, after drawing it is not lined at all, but solid. In order to turn it into a dashed line, you need to change the scale of the line type.

There are four system variables to control the scale of linetypes in AutoCAD:

• LSCALE (_LTSCALE)
• CELTSCALE
• PSLTSCALE
• MSLTSCALE

Let's look at each in detail and learn how to properly control the display of lines in your drawings.

LSCALE (_LTSCALE)

Variable LSCALE (_LTSCALE)(the name is short for Line Type Scale), which sets the global scale of line types. Applies to ALL drawing lines. This is the most important scale, relative to which all other scales are calculated.

Please note that after changing the value of a variable, you need to update the drawing with the command REGEN (_REGEN).

If you work exclusively in Model space (drawing and printing) and do not use annotative scales, then you only need to use this variable. Set the required variable value that matches the scale of your current drawings and use it.

To change the line type scale of a specific object, just enter its properties (Ctrl + 1) and set the desired value

You can also use the Properties window to set a global linetype scale without selecting anything.

In 90% of cases, this knowledge is enough to control the display of lines in your drawings. If you need more fine settings and management capabilities - then read on.

CELTSCALE

Team CELTSCALE(the name is derived from Current Entity Line Type Scale) allows you to set the current scaling factor for the object line type relative to the global scale LSCAL.

In other words, if you have a global scale set, but you need to draw several objects with a different scale without changing the existing ones, then you can override the current scale by setting corresponding value in the CELTSCALE variable.

A line created with CELTSCALE=2 looks exactly the same in a drawing with a base factor of LTSCALE=0.5 as a line with CELTSCALE=1 in a drawing with a base factor of LTSCALE=1.

After you finish creating the lines, do not forget to return the value CELTSCALE = 1. Otherwise, you can get confused and forget, in which case you will draw lines, and they will not be at the scale specified in LTSCALE.

PSLTSCALE

Variable PSLTSCALE(the name comes from Paper Space Line Type Scale) controls the scale of the line types of objects displayed in paper space viewports.

0 - No special linetype scaling is performed on the sheet. All lines in sheet viewports will be drawn according to the LTSCALE coefficient, i.e. exactly the same as in the model.

1 - The linetype scale depends on the viewport scale. When you change the viewport scale, the linetype scale will change accordingly.

It is important to note that the value of the PSLTSCALE variable is set for each sheet separately.

MSLTSCALE

The MSLTSCALE variable (derived from Model Space Line Type Scale) controls the scaling of linetypes displayed in model space according to the annotation scale.

The variable takes two values:

0 - No special linetype scaling is performed. All lines will be drawn according to the LTSCALE factor, regardless of the annotation scale value.

1 - The scale of the line type depends on the scale of the annotation. When you change the annotation scale, the linetype scale will change accordingly.

It is important to understand that MSLTSCALE overrides LTSCALE and CELTSCALE in model space, but has no effect on PSLTSCALE in sheets. In other words, if you control the display of lines using the annotation scale in the model, they will look very different in the sheet.

You can familiarize yourself with other techniques for working in AutoCAD on this page.

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The design documentation system adopted Various types lines. For drawing, solid, dotted, dash-dotted and other lines are most often used. If you work in AutoCAD, you will definitely come across replacing or editing a line type.

This time we will tell you how to create, apply and edit a dotted line in AutoCAD.

Quick line type change

1. Draw a line or select an already drawn object that needs to be replaced with a line type.

2. On the ribbon, go to “Home” - “Properties”. Click on the line type icon as shown in the screenshot. There is no dotted line in the drop-down list, so click on the “Other” line.

3. The Line Type Manager will open in front of you. Click "Download".

4. Select one of the preset dotted lines. Click OK.

5. Also, click “Ok” in the manager.

6. Select the segment and click on it right click mice. Select Properties.

7. On the properties panel, in the “Line type” line, set “Dotted”.

8. You can change the pitch of the dots on this line. To increase it, in the “Linetype Scale” line, set a larger number than the default. And, conversely, to decrease, put a lower number.

Replacing the line type in a block

The method described above is suitable for individual objects, but if you apply it to an object that forms a block, then its line type will not change.

To edit the line types of a block element, do the following:

1. Select a block and right-click on it. Select "Block Editor"

2. In the window that opens, select the required block lines. Right-click on them and select Properties. In the Line Type line, select Dashed.

4. The block has changed due to editing.

That's all. In the same way, you can set and edit dashed and dash-dotted lines. Using the properties panel, you can assign any line type to objects. Apply this knowledge in your work!