To edit the content and appearance of a form, use All Actions – Change Form....
Editing is possible if the user has the Saving user data right granted.
Hide unnecessary fields by unchecking the controls (the exception is the form root object and form setup button);
Add new fields using Add fields button;
Rearrange fields using Move up and Move down buttons;
Join fields into groups using the Add Group button;
Change various properties of form controls.