[GNC] How to create report on checking showing only withdrawals? Or only deposits?

[Fran_3]

I can't seem to create a report on checking (or another asset account) that only shows goes-outta's... aka withdrawals... aka credits.
I tried running a Transaction Report on Checking then hitting Ctl-F and setting the parameters to...
Search for "value" where credits are greater than or equal to zero...
But that did not appear to search the the report as I got opening balances from numerous accounts... and who knows what else.
I made a number of other attempts/experiments but... no joy.
I'm sure this is obvious to those more experienced and hopefully someone will enlighten me :-)
Thanks, Fran3