Show pages continuously, 4 pages a time, but use scrollwheel for navigation.

I often find myself using this program for coursework, which involves great amounts of pdf-converted packs of slides, like so:

I would like to now move backwards or forwards by two slides like I would with the spacebar, I get this:

Which is not quite usable compared to the effect a SHIFT + Space press, which does this:

I would suggest splitting "Show pages continuously" into "Display pages continuously" and "Scroll pages continuously", so that deactivating it doesn't lead to this:

I find this to be the only thing missing from perfect mouse navigation. I love this feature, and would like to use it all the time. Thanks in advance, and congrats on the program. It's super lightweight and usable.