To use text in place of a dimension: Right click the dimension (created dims only) under "properties" on the second tab you will see @D, change the D to an O (the letter O not a zero) and type your text directly after that.

Wildfire 3 Show-Erase Menu
Top Row

• Dimension
• Ref Dimension
• Geometric Tolerance

2nd Row

• Note
• Balloon
• Axis

3rd Row

• Symbol
• Surface Finish
• Datum Plane

Bottom Row

• Cosmetic Feature
• Datum Target

Once and a while you run into a need to do an off the wall thing in Pro/E such as using Superscript and subscript text in a note. On a Pro Engineer drawing you can fill in parts of a note using parameters from the model such as the thickness of material used (can be any parameter) using text &thickness in a note will take the information from the Model parameter for thickness and insert it in your note, well I recently ran into a situation where the thickness was in a parameter and needed to be called out in a note but had a non-symmetrical Tolerance.