How to find exactly where a case variable (process data) is used?

If I wanted to know every single place a case variable (process data) was used in a workflow, how would I go about doing that? I've tried clicking on the names of process data in the "Tree View" on the bottom right and I've tried using the 'Find' tool (CTRL+F), but nothing gives me any information. This is considering that I have many case variables linked to different arrows (sequence flows), so it shouldn't point to one exact place.

Currently using Bonita BPM 6.3.7.