How to annotate a PDF, and how to get the annotations back off
Highlights, comments and sticky notes are separate objects layered over the page. That is why they behave oddly — and how to remove them all at once.
Insights
Document work,
explained properly.
Practical writing about PDF, image and document work — what is actually inside the file, which settings change the outcome, and how to get it right the first time. Every guide is written here, not reprinted.
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How to make a PDF form people can actually fill in
Real form fields versus typing on top, why mobile users often cannot complete your form, and the radio button that will not uncheck.
How to read PDFs on a Kindle without squinting
Kindle displays PDFs but does not reflow them, so an A4 page on a six-inch screen is tiny. The fix is a conversion setting most people miss.
How to scan documents to PDF properly
Resolution, colour mode and lighting decide everything downstream — file size, OCR accuracy, whether it prints. Get them right once.
How to redact a PDF so the text is really gone
Covering text with a black box leaves it fully readable underneath. This mistake has embarrassed law firms and governments repeatedly.
PDF security: what actually works, and what is theatre
Expiry dates, screenshot prevention and copy protection are widely sold and mostly do not work. Two things do. Here is the honest split.
How to make a PDF a screen reader can actually use
Tags, reading order and alt text are what make a PDF accessible. For public sector bodies this is a legal requirement, not a nice-to-have.
What a PDF actually is, and which variant you need
Portable Document Format, and the reason it beat every rival: a page that renders identically everywhere. Plus PDF/A, PDF/X and what each is for.
How to fix a PDF that will not open or renders wrong
Will not open, black boxes, garbled text, missing content, dead links. Five distinct faults that get reported as one, and what each actually needs.
Stop reading, start doing
Every tool in this guide is free.
154 browser-based utilities. No account, no upload, and no file size limit — your files are processed on your own device and never sent anywhere.
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