If you haven't already done so, you will need to set the minimum dimensions of the offcuts you want to keep:
Go to Options / Settings / View & report
Enter desired values in the Scrap criteria - offcuts to keep fields.
After calculation, press "Add usable offcuts to Sheet list" in the main program window.
Usable offcuts will be automatically transferred to the Sheet List for further use. You can enter a description for these offcuts to make them easily recognizable in the list.