Why not duplicate the dimension, drag the copy out to the filter shelf, then select only those that you want to show, then drag out the original dimension, show that as your filter on your sheet and select only relevant values.
You should try something like this:
IF CONTAINS ([CALL_DISPOSITION_CODE_CALCULATED],"CALL BACK")
OR CONTAINS([CALL_DISPOSITION_CODE_CALCULATED],"CALL IN PROGRESS")
If it doesn't work please attach a workbook .
Thanks for your reply. Yeah, I have tried to duplicate the dimension, filter accordingly and place it separately in the columns shelf but it doesn't work. Actually it sits it one over the other on the same column and it doesn't separate the columns.
What you can see below is my effort to display the number of all the "null" maset reject reason, and the OPEN GRS disposition code and the contacted/call back/call in progress entries, but they all sit under one column...