I'm looking for a PDF reader version of this clipboard:

clipboard with ruler

I don't need OCR, text-to-speech, or any fancy features, just a simple digital sliding ruler overlay to keep track of the current line.

Is there a free or low-cost PDF reader (Windows, Mac, or iPad) or add-on that does this?

1 Answer 1


A Ruler for Windows ( https://arulerforwindows.com ) has a feature that allows you to used it as a Reading Guide, basically exactly what you are looking for I think. Its free too. I wrote it.

  • While this is not spam, you should probably read the help on self promotion. Commented Dec 16, 2023 at 3:27
  • Thank you. Following your suggestion, I just did. For others that are interested it is here: stackoverflow.com/help/promotion
    – Rob
    Commented Dec 17, 2023 at 15:10

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