THotPDF.SetLoadedPageRotation Method

Sets the rotation angle of a specified page in the loaded PDF document, rendering the page in the reader at the specified orientation

Declaration

procedure SetLoadedPageRotation(PageIndex, ADegrees: Integer);

HPDFDoc

Name	Purpose
`PageIndex`	Zero-based index of the target page; 0 indicates the first page
`ADegrees`	Rotation angle, must be one of 0, 90, 180, or 270, representing clockwise degrees

PDF 规范仅允许 0、90、180、270 四个旋转值，传入其他值可能导致文件不合规
The rotation attribute is a view attribute and does not affect the coordinate system of the page content stream; coordinates must be converted accordingly when extracting text
The save method must be called after modification, otherwise the changes will not be persisted