See if this is what you are looking for –
Hover over the little bar in the upper-ish right corner of the screen
When the cursor changes to the sort of double-headed arrow with the bar in the middle, hold down the left mouse button and drag down.
You will then get a bar that goes across the screen that you can drag up/down depending on where you want it. If you drag it down so more than a couple of rows are shown, you can scroll in both the top portion and the bottom portion of the screen.
(Each of the pictures above can be enlarged by clicking on them.)