property AllowUserPageChange: Boolean;
Tillater brukerinndata (musehjul, rullefeltdrag, tastaturbindinger) for å endre gjeldende side
Set to False when you want to fully drive the page index from code.
All TPdfView display properties trigger a repaint when assigned; you can change several in sequence without flicker because the redraw is coalesced into a single invalidation.
Active := True.PdfView1.Pdf at runtime, re-apply any view-only settings — the new TPdf has its own state.
begin
PdfView1.AllowUserPageChange := {value};
PdfView1.Active := True;
end;