InfoPath Dev

I am using Infopath 2010 and form library. I am using Infopath form to build approval screen.

May I ask In approval screen, how can we set only allow one user to approve the request. If one user already approved, other user will see Read Only screen.

Thank you.

Anyone can help, please?

I'm not sure how you are selecting your approval managers, however.

You could have the approval set by a button with rule on the button when clicked. This approval button sets another field i.e. ApprovalComplete to 1. Then you can have a form load rule to open up a read only view when ApprovalComplete = 1.