A useful solution for beginners who use Safari pe MAC OS X and are dependent on Bookmarks bar.
By default, once in full screen, the Safari browser hide the bookmark bar, and to make it visible we need to hold the cursor in the upper part of the screen for a while. This can be annoying for users who want to quickly open a Web page din bookmarks.
To make the bookmarks bar permanently visible when working with Safari in full screen, it is enough to press the key combination (keyboard shortcuts):
CMD + SHIFT + B

Note: Test or Mac OS X Mavericks 7.0.1
STEALTH SETTINGS – Always Show Bookmarks Bar in Safari Full Screen (Mac OS X)