HP Intelligent Management Center Standard Software Platform - Manual (Page 532)

The Available Fields area shows only the sections and report objects you
can select for drill down. In general, these objects include field objects,
charts, maps, bitmaps, cross-tabs, and text objects contained in the next
section down (that is, for example, objects in group two when the object
you selected is in group one).
Note:
The Available Fields area does not show suppressed report objects.
4. In the Available Fields area, select the section or report object(s) you
want to use as your drill down destination.
532 Crystal Reports 2008 SP3 User's Guide
Printing, Exporting, and Viewing Reports 20
Viewing reports