I want to put a "Toggle Bookmark" on the toolbar so I right-clicked beside the toolbar and selected "Customize Menus and Toolbars". I got a rather confusing tree of settings, but eventually found "Revert Selected Changes" and clicked "Add After...". After navigating another confusing tree, I found "Toggle Bookmark" so I selected that and "OK". Now I have the "Toggle Bookmark" appearing under the "Revert Selected Changes" in the first confusing tree, but I don't see it on the toolbar, even if when I restart PhpStorm.
I'm running PhpStorm 2016.1.2 on 64-bit Ubuntu.