How to fill an XFA form that says "Please wait..." on Windows or Mac
Your PDF form only shows "Please wait..." or asks for Adobe Reader? It's an XFA form. Here's how to open, fill and save it on a Windows PC or a Mac.
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PDF how-to guides
Short, step-by-step answers to everyday PDF tasks.
How to fill out a PDF form on your iPhone
Fill out a PDF form on your iPhone: type into the fields, tick the boxes, sign it and send it back. Plus what to do when a form won't let you type.
How to edit text in a PDF on your iPhone
Fix a typo, a wrong date or a misspelled name in a PDF on your iPhone, in the file itself, without the original Word document.
myPDF: what comes with the app and what's Pro
What myPDF does without Pro: signing, form filling, scanning and markup. Editing text, merging, compressing, converting and redaction are Pro, one purchase.
myPDF vs the PDF tools on your iPhone: what you can do without paying
What your iPhone already does with PDFs, what myPDF adds without Pro, and which jobs need myPDF Pro, a one-time purchase. As of November 2026.
How to highlight and annotate a PDF on your iPhone or iPad
Highlight, underline and add notes to a PDF on your iPhone or iPad, then read it in Night or Sepia mode. Included in myPDF, no account needed.
How to redact a PDF on your iPhone (and check it really worked)
Black out an account number or address in a PDF on your iPhone, remove the text underneath for good, and test the file before you send it.
PDF too large to email? How to compress, split or merge PDFs on your iPhone
PDF too large to email? Compress it on your iPhone, split it into smaller parts, or combine several PDFs into one file before you send.
How to scan a document to a searchable PDF on your iPhone
Turn paper into a clean, searchable PDF on your iPhone. Scan several pages, crop each one, and save with a text layer you can search and copy.
How to sign a PDF on your iPhone
Sign a PDF on your iPhone without printing it. Draw your signature or use a photo of it, type your name and date, and reuse it next time.