You can use a driving dimension in an annotation just like you'd do in a note. Let's say the dimension of interest is called "d1" in the model. When you are doing the note or annotation in the drawing, you call out the dimension in the text, such as
"THIS IS THE VALUE OF D1: &d1"
and it will put the value into the text. You can also set tolerances on the dimension and they will be brought into the annotation, too.
If you've created a dimension in a drawing and want to use it, you can do this, too. You just have to Edit the properties on the dimension of interest, then make note of its name, usually something like "ad1". You can then use &ad1 or whatever in the annotations just like we did &d1. I use this "cheat" a lot for bent sheet metal parts that have corner radii on them that I want to indicate in the bent part view. Comes in handy for countersink and counterbore dimensioning, too.
