You can edit the thickness of your path material or the path’s overall width.
To edit the thickness or width of a path:
Select the path. If the path has multiple segments, you do not have to select them all. Property changes affect the whole path.
Right-click and select Properties, or select Edit > Modify Elements > Properties.
To edit the thickness of the path, enter a value in the Thickness edit box.
To edit the width of the path, enter a value in the Width edit box.
Click OK.