Shows how to use the Page.AdjustCoordinates() method to convert visual coordinates (measured from the top left corner of the page according to DsPdf rules) to correct coordinates in a PDF that was loaded into GcPdfDocument and may have arbitrary unknown transformations applied to its pages. The adjusted coordinates can be used to position annotations (redact in this case) etc. The PDF used in this sample has one page containing the scan of a sample invoice that was rotated 90 degrees clockwise. The PDF page is rotated 270 degrees to compensate (so that visually the page has correct portrait orientation).
