Mouse Wheel suggestion

[masu]

Mouse wheel should change the image selection if the cursor is on the left file selection tree

[jgpaiva]

I don't think i agree with you masu. Only because the left pane is like a file explorer, it shoud behave like one.
The problem is if you have several images in that folder. If you're seing the first one, you'd have to load each one of them to access the last one.
I know, you can always use the scroll bar, but I'm lazy
(just my $.02 )

[mouser]

i agree with jgpaiva on this one - if you have lots of images, you really need it to the scroll the window just like in an explorer pane.  you can however use the down arrow and up arrow to go up and down selecting images

[hamradio]

I have to agree with jgpaiva and mouser...as if you had for example a really large image (5000wx5000h) then it would have to load that then load the next one and so on.