procedure DeleteAnnotation(Index: Integer)
Removes the annotation at the given index on the current page.
Call UpdatePage afterwards to refresh the rendering cache.
All edits to the current page are buffered in PDFium's in-memory representation. Call UpdatePage to refresh the rendering cache and SaveToFile to persist the changes.
Pdf1.Active must be True and a page must be selected before calling these primitives.
begin
if Pdf1.Active then
begin
Pdf1.MoveTo(100, 100);
Pdf1.LineTo(200, 150);
Pdf1.LineTo(200, 200);
Pdf1.ClosePath;
Pdf1.AddPath(clRed, 1.5, clYellow, fmWinding);
Pdf1.UpdatePage;
end;
end;