Re: free app to modify pdf files

Op 17/06/2025 om 20:21 schreef Arno Welzel:

sobriquet, 2025-06-17 13:27:
 

Op 15/06/2025 om 19:05 schreef Arno Welzel:

sobriquet, 2025-06-14 19:57:
>

What's the best free app to modify pdf files on android?
So not just viewing a pdf file, but actually making changes in it, like
filling out a form with additional information.

>
Filling out forms is not "modify" - it is just filling out a form in the
PDF and storing the result.

>
Modify has the general meaning of "making changes" as one of its
connotations. So if you change anything about a pdf file, like filling
a pdf form, that can be understood as modification.

 Yes, but you do *not* change the PDF itself. You just enter something in
form fields provided in the PDF. And you can then save the PDF with the
filled form. But when you open it again you will see, that the form
fields are still there and can be changed again - but nothing else,
since you will not change the PDF.
 It's like filling a form on a website - you do not change the website
itself just by filling a form and sending it.
 

It depends how you interpret "change". If you fill out a form I would say you change the form from an empty form to a form that has been filled out. Also, it's natural to think of it as modifying the pdf
file, since the file attributes like "date last modified" will
typically change, while it wouldn't change if you just read the
pdf file without making any changes to the file.