You can view the pledges due and amounts paid for all constituents by viewing the main Pledges grid. If you want to view a constituent’s particular pledge, you can go to that constituent and click on View/Edit. The pledge schedule will show each payment due as well as which ones have been received.

Please note to mark a pledge payment as paid you'll need to enter a new gift as a pledge payment. You will not be able to just check mark under the paid column