You can view the complete list of available apps by swiping the app bar to the left, to open the app drawer.
Additionally, you can reorganize your app list so that it's more comfortable to use by going to drupe settings > General > Applications. Pick up an app by holding the controller on its right, sliding it along the list and finally dropping it in the desired spot.
You might want to place the apps you use most frequently above the line, to keep the in the bar that's always visible without having to open the drawer to use them.