Image adjust functions:

A : Fit to width / height
L : Rotate to the left
Q : Always on Top
R : Rotate to the rigth
W : Show pages at full size
Magnifying glass:

Alt + Wheel mouse up : Decrease horizontal size
Alt + Wheel mouse down : Increase Horizontal size
Ctrl + Wheel mouse up : Decrease vertical size
Ctrl + Wheel mouse down : Increase vertical size
Shift + Wheel mouse up : Zoom out
Shift + Wheel mouse down : Zoom in
Wheel mouse up : Decrease size
Wheel mouse down : Increase size
Z : Show/hide
GoTo Flow functions:

S : Show/hide
Wheel mouse up : Next flow page
Wheel mouse down : Previous flow page
Enter : Go to current page