There are actually 2 items laid one on top of the other. The one you can't see to click on is the 'Tools' button. With the system page open, double-click one of the items such as time to open the properties window. Then, use F7 or Tab to cycle through all the items. Use Shift + F7 or Tab to move backward. At this point, you should be able to locate the button with a Special Action of 'Tools' on the ActionList tab.