if you wish to be so easy/convenient/intuitive please think all the way to fine details in the devil:
allow one to click in 1 slide thumbnail under the main slide in the strip, then with arrow key flip right/left to go through the slides,
that is if you click right in strip, it advances to the next slides and shows it on as main screen.
instead of now, having to move mouse & click on each slide which is cumbersome. Click-through is faster.