1.Double-click the object whose line width you want to change. (The Object Properties dialog opens.)
2.Click the Colors tab.
3.Select the desired line width (in units of 1/96 inch) from the Line width dropdown list. Leave Line width blank if you want to use the default line width specified on the Pen Width tab of the Interface Properties dialog. See To specify the default line width (pen width).
Tip
If the Object Properties dialog is already open, you only need to click once on an object to change its Line width property.