2012

The default alignment is horizontal dimension text, even for vertical
dimensions.
Position Dimension Text Horizontally
The position of the text along the dimension line in relation to the extension
lines is referred to as text placement. To place text yourself when you create
a dimension, use the Place Text Manually option on the Modify/New
Dimension Style dialog box, Fit tab. Use the text placement options to
automatically place text at the center of the dimension line, at either extension
line, or over either extension line.
First and second extension lines are defined by the order in which you specified
the extension line origins when you created the dimension. For angular
dimensions, the second extension line is counterclockwise from the first. In
the following illustrations, 1 is the first extension line origin and 2 the second.
If you place text manually, you can place the dimension text anywhere along
the dimension line, inside or outside the extension lines, as you create the
1548 | Chapter 31 Dimensions and Tolerances