PDF checkpoint - Ability to reference portions of the pdf

Our SUT produces PDF's, with an date-time stamp in the contents of the pdf.

When comparing pdf's using checkpoint, a day later than today these checkpoints fail.

Would it be possible to add a feature, for PDF checkpoints that you can indicate which portions of the pdf to compare? With that we can ignore the header in our pdf where the date-time stamp are printed, and thus the checkpoint passes.