How to deactivate option to cancel User Decision

["Schröder, Ute Marion"]

Hi workflow-gurus,
 
might be a stupid question, anyway,
I give it a try.
I was asked whether it is possible to hide the cancelation-button in a =
user
decision.
I=C2=B4ve definied two decisons, the system automatically generates the
cancel-button.
The Users in question don=C2=B4t want that button.
 
How can I hide this button?
If so, can anyone please tell me where to look?
 
Thanks a lot for your help.
 
Ute