After you draw dimensions, you can edit the position of the various parts of each dimension and change the contents of the dimension text. AutoCAD groups all the parts of a dimension into a single object.
Editing dimension geometry
The easiest way to change the location of dimension parts is to use grip editing, which I describe in Chapter 10. Just click a dimension, click one of its grips, and maneuver away. You'll discover that certain grips control certain directions of movement. In general, selecting a dimension displays grips at the text, the ends of the dimension lines, and the defpoints. Experiment for a few minutes to see how they work.
In AutoCAD 2012, dimensions join the group of objects that feature multi-function grips. Click the text grip on a linear dimension and use the grip menu to adjust the text location. Click an arrow grip and you can create a continuous or baseline dimension from that end of the dimension, or you can flip the arrow. You can do these things by selecting a dimension and changing items in the Properties palette, but the multi-function grips make it a lot more efficient.
If you want to change the look of a component of a specific, individual dimension (for example, substitute ...