Make sure that the "Allow Check Reconciliation" box is checked under Edit | Company Profile.

Then use Payments | Check Reconciliation.

Although I don't mind answering trivial questions (actually it's sort of a break in my otherwise hectic day), I think in the long run you would be better off reading the manual, and saving the forum for when you are REALLY stuck.

If you are not a reader, then ask your Adagio consultant to come in and do some basic training.

Steve