I would not link highlights with bookmarks because of the difficulties associated with sorting them later and with displaying the bookmark list. Currently, if I want to highlight, I could set a bookmark without a text - obviously a nightmare in terms of having an organised bookmark list, as this would exactly create that 'forest' you mentioned.

Bookmarks ought to be just that - a referrer to a specific page in the book with a short description of the relevance.

Highlights/underlined text should not be listed with the bookmarks to avoid clutter. They would serve simply as graphical aid to emphasise the most important parts of the text and it might be helpful to create a one-click tool in order to place them (similar to Acrobat). The search function could then contain a check box to limit the search to highlighted/underlined parts or to list highlighted results first. Alternatively/additionally, they could be listed separately, thereby creating a 'virtual excerpt' of the original text with just the passages/paragraphs containing highlights and thus being most relevant to the user (bookmarks could be used as additional headlines?).

This way, it would be possible to work with and 'organise' the text, making relevant information directly visible without creating a huge amount of bookmarks. When reading an industry standard, f.e., the bookmark would help me to find the text dealing with financial derivatives, the highlight then alert me to the fact that this or the other only applies to publicly listed companies - I would need this sort of detail in the bookmarks listing, though.

Also nice, to gather one's thoughts and keep them together with the text, would be an opportunity to leave annotations on a page. Again, these would not be listed with the bookmarks but it would be good to be able to add an emphasis in the search function or even exclusively search meta data.

Of course, all these tags need to stay with the e-book through future versions of the program as well.

Most of what I said here is probably platantly obvious to you and need not be explained; I did so just to avoid confusion about what I mean to be linked/listed with what and to clarify my previous post.

Thank you for your quick reply and Best Regards

--- PS

After looking at a document with a number of graphs/tables printed sideways: It would be great to be able to rotate pages!