Dimension Palette - Alignment Tools
When you select two or more dimensions in a drawing, a set of alignment tools appears on the dimension palette.
To adjust the spacing between dimensions:
Use the thumbwheel in the dimension palette or manually drag the dimensions. The thumbwheel appears in the dimension palette only when spacing options are available.
The Dimension Spacing Value is the scaling factor for the spacing. For example, 2 increases the spacing by a factor of 2, or doubles it.