Bookmarks originally only saved location data and zoom; you needed to remember which files were open. The updated Bookmarks feature now will record location information, zoom, but also which files were open at the time. This gives the user a huge advantage. As before, you can zoom in to a specific gene region and create a bookmark. When you open this bookmark again, it will zoom into that region. However, if the file is not open, or you are looking at a different speciae, IGB will now open the file that was bookmarked at the region of interest; you no longer have to reset IGB for the species, genome and file before using your bookmarks! IGB Bookmarks will now do this for you.
Another excellent use of this feature is to open a set of files with one click. Initially, you open each one of the multiple tracks of interest, at maximum zoom if there is not a specific region of interest. Then create a Bookmark. After that, one click of the bookmark opens the full set of files.
Bookmarks are still subject to the normal functionality of IGB. If you have Arabidopsis thaliana, 2009 genome open, but your bookmark is for the 2008 genome, when you open the bookmark, only the files listed in the Bookmark will be open. Tracks opened in the 2009 genome will go away. On the other hand, if you have a track opened in the 2009 genome for instance, and the bookmark is also from the 2009 genome, then the bookmarked files will open and maintain the originally opened track.