The first tab in the Dimension style dialog box is Lines, where we will control Dimension lines and Extension lines. It looks like the following:

Under Dimension lines you can control the following settings:

• The Color, Linetype, and Lineweight of the Dimension line.

• Extended beyond ticks (in order to edit this value, go to the Symbols and Arrows tab and set the Arrowhead to Architectural tick or Oblique). See the following illustration:

  

• Baseline spacing, see the illustration below:

  

• Select to Suppress Dim line 1, Dim line 2, for one of them or for both. See the illustration below:

  

Under Extension lines you can control the following settings:

• The Color, Linetype, and Lineweight of the Extension lines.

• Select to Suppress Ext line 1, Ext line 2, for one of them or for both. See the illustration below:

  

• Specify Extend beyond dim lines and Offset from origin. Check the illustration below:

  

• Select to set a Fixed length extension line. You have to specify the Length. In order to understand this issue, see the below example:

This is an example to clarify Fixed length extension lines:

• Assume we have the following case and we want to put a linear dimension

  

• Before AutoCAD 2006, the only choice was as follows:

  

• As of AutoCAD 2008, a new choice called Fixed length extension lines is available to get...