property PageZoom[PageNumber: Integer]: Double;
Zoom de solo lectura necesario para ajustar la página actual a la vista con el DisplayMode actual
Combine with PageWidthZoom / PageHeightZoom / ActualSizeZoom to build custom fit buttons.
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.PageZoom := {value};
PdfView1.Active := True;
end;