How to Change Thickness of Polyline in AutoCAD?

Understanding Line Thickness in AutoCAD

Changing the thickness of polylines in AutoCAD can significantly affect the visual representation of your drawings. Adjusting line thickness allows for clear distinctions between various elements, enhancing overall clarity. Here’s a comprehensive guide on how to alter the thickness of polylines in AutoCAD.

1. Check Current Line Thickness

Before making any adjustments, it is essential to verify the current line thickness of your polyline.

• Select the Polyline: Click on the polyline to view its properties.
• Access the Properties Palette: Right-click and choose ‘Properties’ or type PROPERTIES in the command line.
• View Current Thickness: In the properties window, check the Global Width value, which dictates the thickness of the polyline.

2. Changing Line Thickness

To modify the line thickness effectively:

• Open the Lineweight Panel:

  1. Navigate to the Home tab.
  2. Select the Properties panel.
  3. Click on Lineweight to open the dropdown menu.
  4. Choose Lineweight Settings.

• Adjust Lineweight:

  1. In the Lineweight Settings dialog, use the dropdown to select your desired thickness.
  2. Confirm your selection and close the dialog box.

3. Modify a Single Polyline Thickness

For altering the thickness of a specific polyline:

• Select the Polyline: Click on it within the drawing area.
• Open the Properties Palette if it’s not visible.
• Change Global Width:
  • Under the General section, find Global Width.
  • Input the new value to adjust the thickness as desired.

4. Adjusting Multiple Polylines

If you need to change the thickness of several polylines simultaneously:

• Use Quick Select:

  1. Type QSELECT in the command line and press Enter.
  2. Specify selection criteria: set Object Type to Polyline and Property to Global Width.
  3. Set the condition to “Not Equal To” and input a specific value if necessary.

• Change Width for All Selected Polylines:

  1. With the polylines selected, right-click and choose Properties.
  2. Modify the Global Width value for all selected items at once.

5. Resetting Polyline Widths

Occasionally, you may want to reset polylines to a default thickness:

• Enter the Pline Command:
  1. Type PLINE in the command line and press Enter.
  2. Click to select the polyline you want to reset.
• Change Width to Default:
  • Type L, press Enter, and enter 0 for the default width.

Frequently Asked Questions (FAQ)

Q1: Can I set a default thickness for all new polylines?
Yes, you can set a default lineweight that will automatically apply to all new polylines. Access the Lineweight settings from the Properties panel and set your preferred value before drawing.

Q2: What happens if I change the lineweight of an existing polyline?
Changing the lineweight of a polyline will affect its visual appearance in the drawing. The thickness change will be reflected in the display and in any printed outputs.

Q3: Is it possible to make a polyline closed or open?
Yes, you can create either closed or open polylines. If you want to convert an open polyline to closed, use the CLOSE option while editing it. If it refers to a combination of line segments, it can also remain open.