I'll check it out. That's fantastic.
Open any PDF in your Files and you can now fill it in, sign it, highlight, add text and fields, reorder or delete pages, and send it to someone else to sign.
You can also edit text that is already there. The old words are taken out of the file, not just covered over, and the rest of the line stays where it was. When the editor can't be sure it has the right words, it says so and covers them instead, and the note on your copy tells you which happened.
It is still a beta, so check your copy before you send it. We tested it on about twenty public PDFs (papers, IRS and immigration forms) with no wrong words removed. Locked or encrypted forms can't be saved into, because their authors forbid changes, but they still open for viewing and printing.