How to Change Lineweight in AutoCAD Quickly and Easily

To change lineweight in AutoCAD, select the objects you want to modify, then open the Properties panel and adjust the Lineweight setting. Alternatively, you can set default lineweights by typing LINEWEIGHT in the command line and choosing your preferred thickness.

Syntax

In AutoCAD, changing lineweight is done through the Properties panel or the LINEWEIGHT command. The key parts are:

• Select objects: Choose the lines or shapes to change.
• Properties panel: Displays editable properties including Lineweight.
• Lineweight values: Thickness options like 0.25 mm, 0.5 mm, etc.
• Command line: Typing LINEWEIGHT opens lineweight settings for defaults.

plaintext

LINEWEIGHT
Select objects
Properties > Lineweight > Choose thickness

Example

This example shows how to change the lineweight of a selected line to 0.5 mm using the Properties panel.

plaintext

1. Draw a line using the <code>LINE</code> command.
2. Select the line by clicking it.
3. Open the <code>Properties</code> panel (type <code>PROPERTIES</code> if not visible).
4. Find the <code>Lineweight</code> property.
5. Click the dropdown and select <code>0.50 mm</code>.
6. Press <code>Enter</code> to apply.
7. The line now displays with a thicker weight on screen and print.

Output

The selected line appears thicker with a 0.5 mm lineweight.

Common Pitfalls

Common mistakes when changing lineweight include:

• Not enabling lineweight display: Use the LINEWEIGHT button on the status bar to toggle visibility.
• Changing lineweight on locked or frozen layers, which prevents updates.
• Confusing lineweight with line type; lineweight controls thickness, line type controls pattern.
• Forgetting to set plot style to use object lineweights, so changes don't appear when printing.

plaintext

Wrong way:
- Selecting objects but not enabling lineweight display.

Right way:
- Click the LINEWEIGHT toggle on the status bar to see changes immediately.

Quick Reference

Action	How to Do It
Select objects	Click or drag to highlight lines or shapes
Open Properties panel	Type PROPERTIES or press Ctrl+1
Change lineweight	Choose thickness from Lineweight dropdown
Toggle lineweight display	Click LINEWEIGHT button on status bar
Set default lineweight	Type LINEWEIGHT command and pick default value

Key Takeaways

Select objects and change their lineweight in the Properties panel for precise control.

Toggle lineweight visibility on the status bar to see thickness changes on screen.

Ensure layers are not locked or frozen to allow lineweight changes.

Use the LINEWEIGHT command to set default thickness for new objects.

Remember lineweight affects thickness, not line pattern or color.