PDFium Component Docs

SetPageBox method

Component: TPdf · Unit: PDFium

Writes a new rectangle for the named page box (MediaBox / CropBox / BleedBox / TrimBox / ArtBox) on the current page

Syntax

procedure SetPageBox(Box: TPdfPageBox; const Rectangle: TPdfRectangle);

Description

Writes a new rectangle for the named page box (MediaBox / CropBox / BleedBox / TrimBox / ArtBox) on the current page

Call UpdatePage after to commit the change; required to crop or pad printable PDFs

Wraps the corresponding PDFium API and exposes it as a TPdf instance member so consumers do not have to manage FPDF_DOCUMENT handles directly

Remarks

Always check Pdf1.Active before calling page-scoped operations; methods that require an open document raise EPdfError otherwise
Document-edit methods (AddPage / DeletePage / UpdatePage / CreateAnnotation) leave the in-memory document dirty — remember to call SaveToFile to persist
Class methods (LoadLibrary / UnloadLibrary / GetRecommendedV8Flags) can be called without a TPdf instance

Example

if Pdf1.Active then
Pdf1.SetPageBox;

See Also

GetPageBox, PageBox, PageBounds