Mark
Annotate and edit a PDF
Six tools for acting on what is written: rewriting text in place, laying a mark on top, signing, filling in. None of them sends the document anywhere, and this is the family where that matters, since it is here that you type your name, your signature and your answers.
All tools
Editing the text, or writing over it
These are two different gestures and the PDF treats them differently. Rewriting a line replaces it in the document itself, in its place and in its own font: the old text does not linger underneath and does not come back on a copy-paste. Writing over adds a layer: free text, a stroke, a highlight, a box, an image. The first is for fixing a typo or a date, the second for commenting, striking through, completing a document you did not produce.
Why a line sometimes changes appearance
A PDF usually embeds only the characters it actually uses: a font arrives inside it already cut down. Adding an accent, a typographic quotation mark or a Chinese character to a line then calls for a font the document does not carry, and the line is redrawn in a close substitute. Atelier Docs says so while you type and names the fallback font; it does not wait for the export, when it is too late to change your mind.
Sign, fill, flatten
A form filled in but not flattened stays editable by whoever receives it, and some phone readers do not even display the values typed in: the page arrives blank. That is why Fill converts the fields into ordinary artwork after typing. The signature follows the same logic: typed in one of fourteen handwriting fonts, it is set as vector artwork and stays sharp at any magnification, where a photograph of a signature turns to pixels.