Design and Run modes
You can view forms and reports (and other files) in Design mode and Run mode.
Use Design mode to design the appearance and behavior of the form or report and the components you put on it.
Use Run mode to see how a form or report looks when running. In Run mode, the components become active. For example, you can enter data into an entryField control and edit data that’s already there.
Use the Design and Run toolbar buttons, or choose the appropriate command from the View menu, to switch between modes.