Thanks but I use a Mac and its a work computer. There are issues with the fact he isn't an authorised developer and to use the jar file I need to then install a java developer kit. So this is not an option and does not really address the original point. Why even create 2 separate icons if there is no difference between them, and if there is a difference what is it? I want to create a product catalogue with bookmarks and I want them to all look the same and not be misleading to our customers. Adobe should not force us to resort to 3rd party developers to fix an issue they do not even seem to acknowledge
At the icon you can see that the bookmarks were created with the combine feature.
You don't need a third-party tool for this. You can create/write a plugin for Acrobat.
I understand the source of the different icons Bernd as I stated in my original text. Unfortunately I don't know how to write a plugin but if I did I shouldn't have to waste time creating one to fix an issue that shouldn't even exist. Why do I (as the creator) or anyone else (as the viewer) need to know if a bookmark was created by either combining files or adding a bookmark manually? If they provide different features or functions that is reasonable and I would like to know what they are. If there are no differences in use then Adobe either shouldn't create 2 different icons or give us the option to chose which icon we wish to use. Common sense would suggest the former.
I know I'm replying to an old thread, but I recently came across this same question and found that there is a difference between the two types of bookmarks you refer to. The bookmarks that are created manually function just how I imagined all bookmarks function, they bring you to a specific page for easy reference. The bookmarks that are created by merging pdf's are different in that they are still linked to all the pages their file was associated with. This provides an advantage if the end user wants to extract those pages they can right-click on that bookmark and extract all pages associated with it. In my experience that's not a common thing to do, but there is added functionality by having the two types of bookmark.