PageHeightZoom プロパティ

page height が view に収まる read-only zoom factor です

Useful for building a "Fit Page" toolbar button.

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.

• Set design-time defaults in the Object Inspector or assign at runtime before Active := True.
• 変更は、永続状態に影響するプロパティ (例: Pdf.PageRotation) に対してのみ基盤の TPdf へ伝わります。純粋な表示プロパティはビュー内に留まります
• If you replace PdfView1.Pdf at runtime, re-apply any view-only settings — the new TPdf has its own state.