No more font or formatting problems after edits
Drag over what must go. It is removed from the file, not just covered with a black box.
A customer's name blacked out on an invoice.

Press Redact on the left and drag over the text or picture. The frame snaps to the words it mostly covers, so you see exactly what will go. Mark as many areas as you need, on any page.

Press Black out for good. Everything under the frames is taken out of the file, and a black box is put in its place.

A black rectangle drawn over text hides it from the eye only: the words are still in the file, and anyone can copy them or lift the box. Many leaks happened exactly this way. Seamtype takes the words out.

The letters and pictures under the frame are deleted from the page's content, so they cannot be selected, copied or found by search.
The frame snaps to the letters it mostly covers: a letter only touched by its edge stays, a word mostly under it goes whole.
After blacking out, the page is compared with the original outside the frames. If anything there would change, the page is left as it was and you are told.
The box shows the reader that something was removed, as on a redacted paper document.
Not in the file, not under the box.
Nothing outside the frames changes.
Mark them on any pages, black them out together.
Names, numbers, signatures, photos.
Every redaction is in the list of edits.
In the browser, on a computer or a phone.
After download, the removed text is not in the file. Until then you can still undo the redaction.
On a scan the text is part of a picture: the picture's pixels under the frame are painted black in the picture itself, so nothing is left to recover.
Text inside an embedded block or a page that cannot be rewritten without changes is left as it was, and you are told why.
Because the text under the box stays in the file: it can be selected, copied and found by search. Redaction must remove it.
No. The removed words are not in the downloaded file; there is nothing under the box.
Mark each place where it is; all marked areas are blacked out together.