I just upgraded my rMBP from OSX Mountain Lion to OSX Yosemite. I am generally not a fan of updating as you can tell. The only reason I updated is because I got an iPad Mini. I noticed on the built-in "Preview" app, the "Bookmarks" menu in the top bar is gone. Instead, under the "View" menu you can select "Bookmarks" which will show your bookmarks in the left sidebar. There are 3 problems with this change. First, it is an extra click to go to your Bookmarks. Second, your Bookmarks dominate the sidebar when I prefer Thumbnails in the sidebar. Third, and most importantly, the Bookmark titles are totally missing. All of my Bookmarks lose their meaning when I cannot see what I labeled them. This is a significant inconvenience. Is there any way to resuscitate the Bookmarks menu from the previous version of "Preview"? This seemingly tiny change is a hugely utilized feature for me and may force me to return to Mountain Lion. Thanks in advance.