Zooming out with a Trackball?

Well my cousin has a wheel mouse that allows you to zoom in and out which is pretty nice, but i have a trackball and i have no idea if its possible to zoom out or not.

If anyone knows how i could zoom out then that would be much helpful.

yeah noticed that the other day playing this on my laptop...no real way to zoom out w/o scroll wheel

my track marble works fine for moving the view in any way including point blank ot long distance

right click and move marble (mini trackball)

never go back to regular mouse

edit left for right

Try pressing both buttons simultaneously and moving the trackball up and down. This accomplishes zooming with my trackball (a simple Kensington Orbit with just 2 buttons and the ball).