Probably you have two different questions.
1. As far as I know, Alt+Enter does not included into the list of VFP on key label action.
2. Probably the PgDn & PgUp problem does not related to Alt+Enter action.
It may happen if the form Name and the ReportPreview Window name are the same.

Best Wishes

>>>>>>>>>>>>>Your message below
My reports are excluded from EXE. When the user see the preview and then press Alt + Enter properties of some field appears on screen. The user can make changes in properties. There are no problems if the report contains only one page but if there are more pages & the user press PgDn & then PgUp BOOOM (if he/she is make canges in properties). How can avoid this action? I try ON KEY LABEL Alt+Enter DO Dummy but Sintax Error apears.

Boris