Signification of different symbols for bookmarks in PDF file
Hello, I'm actually creating a PDF file for work, and I happen to have different symbols for bookmarks.
I'm wondering what they mean.

The symbol 01 was created by simply clicking the "add bookmark" button.
The symbol 02 was created when I merged different files together to create this final PDF file with a bookmark for each file.
I guess these bookmarks are linked to a place in the document and not a different PDF (meaning if I send just this PDF file to someone, he will see everything.)
So, why these 2 different representations of the same thing?
Thanks !
