Documentation Link

https://matplotlib.org/stable/gallery/misc/multipage_pdf.html

Problem

The issue is in the first two paragraphs of the page.

This is a demo of creating a pdf file with several pages, as well as adding metadata and annotations to pdf files.

If you want to use a multipage pdf file using LaTeX, you need to use from matplotlib.backends.backend_pgf import PdfPages. This version however does not support attach_note.

Reading, it is unclear whether "this" in the last sentence refers to pdf backend (as suggested by it being on the page for it) or pgf (as suggested by it being in the paragraph about pgf).

Only after clickking on the hyperlinked attach_note do I have to notice that it is a documentation page for a specific backend (which isn't obvious, being sent to an anchor in the middle of the document without header visible). From there, seeing that pdf has attach_note() I can infer that pgf doesn't. That string of logic is quite long for something that should have been clearly stated.

Suggested improvement

Change "this" to "that" in the last quoted sentence would probably make it clearer it is referring to the backend not used in the example. Or perhaps a different change in wording.