[sounddiver_ms]

I use mobilesheets only as a library for my sheet music. Mostly the pdfs are books with several pieces in them. I can only look for the title of the book. Where can I store a list of the pdf's content (by hand), so that the pdf is called up by search of an included title? Example: an existing pdf "Collection". It contains the titles "Spring", "Summer", "Autumn" and "Winter". Where to can I write these four words so that when searching for one of them the pdf "Collection" is called up. Thanks a lot.