If you want to go back after running a drill report, click the Previous report button.

“Drills” are what we call the numbers in the reports that you can click on to run another report.

When you are done looking at the results of a drill, often you want to go back to where you were.  The ordinary browser back button does not work so Cognos provides a button called Previous report.  It only appears when you have done a drill.  It takes you back.