Architecting and designing : IDEF : IDEF0 : Calculating cost in IDEF0 diagrams : Defining activities in IDEF0
  
Defining activities in IDEF0
After creating a function or activity symbol, you must define it. Defining allows you to attach Graphic Comment.
1 Double-click the activity.
2 In the Modify Definition (Function/Activity) dialog box, type a description in the Graphic Comment field.
3 Click OK.
See also
Calculating cost in IDEF0 diagrams