Drill-Down is a wonderful feature, but it can confuse those who don’t expect it. Even when you suppress sections a user can drill-down to an empty screen and not realize what they have done. Or they will accidentally drill down when the details are not hidden. They end up on a new tab and don’t know how to get back.
The simplest solution I have found is to cover all the fields in the group header or group footer with a single large text object and make sure it is in front of the the other objects. Crystal won’t drill-down on a text object so putting this in front of all of the fields prevents the user form using any object in this section to launch a drill-down – intentionally or accidentally.
And if your users will be running their reports from within CR it is also a good idea to make the text object “Read Only”. This way they won’t double click by mistake and edit the text.