(1) mouse pointer: no problem (like
adicoto)
(2) to decrease screensize: why don't you use minus on numeric keypad?
(This actually is default key for pan-out, but isn't the result what you mean? Alternatively you could use zoom-out, but you have to define a key for that first through ... right-click > Options > Preferences > Key definitions & WinLIRC in which connection please also duly note that definitions should be set separately for Windowed mode and for Full screen mode)
