Safari browser displays bookmarks bar below the address bar but you can hide this to have more display space for displaying web page content.
The bookmarks bar in Safari browser can be hidden using the General Settings menu. Click the General Settings menu available at the top right corner. This would display the following list of menus.
Now select Hide Bookmarks Bar from the list of available menu. This would hide the bookmarks bar. The keyboard shortcut for thus is Ctrl+Shift+B.