Billing worksheet

Hi all - I'm using Sage Timeslips 2020.  My version has a field called "Time estimated"  that I can input on any given time slip.  I would like to be able to see that field on the Pre-Bill worksheet but I can't find any option which will let me do so, not can I figure out how to edit the report template to add that field.  Has anyone dealt with this?  TIA!