When you launch Safari on OS X Mavericks, you’ll typically get a set of thumbnails of web sites you’ve visited, called Top Sites. The default set is twelve thumbnails, but if you hop into the Safari preferences, you can set it to display six, 12, or 24 Top Sites.
Launch Safari on your Mac and either hit Command-Comma on your keyboard or select Preferences from the Safari menu. Click on the General tab at the top of the Preferences window, and then look about midway down the window.
You’ll see a drop down menu with the label, “Top Sites shows.” Click on the drop down menu and choose the number of sites you’d like to have displayed when you open a new window or tab in Safari (you can change this default behavior, too, from the drop down menus just above).
Now you’ll have just the right number of Top Sites staring at you when you open a new window or tab in Safari. Of course, if you don’t like any of them, you can always get rid of it.
Via: Macworld UK.