Storage location of information on what page the user is reading in Reader

Question

Adobe Acrobat Reader and Foxit Reader both have a feature that allows them to remember what was the last page the user was reading.

Where do these PDF readers (both Adobe and Foxit) store such information?

Answer 1

Most likely the registry. For instance, Foxit Reader stores that information at the following location:
HKCU\Software\Foxit Software\Foxit Reader 5.0\Preferences\History\LastOpen
(The exact path might be slightly different for different versions.)

Ther's a subkey for each recently opened file, and a value called Page stores the page number where that file was opened last.

Answer 2

In some cases, I think this kind of data can be stored as metadata for the PDF, which is basically just key-value pairs.

In other cases it might be stored by the particular application used to open/modify the PDF (the location would then vary from application to application).

Answer 3

Thanks Indrek. Your information also helped me.

I had the bad habit to keep opened many opened tabs. Also, I turned on the reopen last session feature.

One day, the program started to load all files, but after the 132th one, the software crashed.

The registry path I searched in this case was

"HKCU\[...]\History\LastSession".

And there it was a list in the same fashion as the \LastOpen registry dir.

I deleted the last folders inside that dir, and Foxit started to work again.

Maybe this info could help.