naming dimensions

I know how to name a dimensions in a sketch, but how do you name a
dimension in a feature. For instance, if you have a dimension in
Extrude 1, the default name is something like D1@Extrude1. How can I
change that name to something like Head Length@Extrude1?

 

Double-clicking on a feature in the design tree will cause the
dimensions associated with it to show up. From there, it's a matter of
renaming them just as you would in a sketch.

 

That did it. Thanks!