Scroll to zoom on a mac with a non-mac usb mouse Moving over to a mac from windows and one feature I really enjoyed was being able to map my scroll up and scroll down keys and (+) and (-) respectively.

Then, while in a web browser or picture preview I could hold ctrl and scroll up and down to zoom in and out.

I have been having trouble implementing this for my mac. I tried the better touch tool but can't seem to make it work with that.

I also tried System Preferences->Accessibility->Zoom to change the settings there but it does not increase the size of whatever I am viewing, it just actually zooms in the entire computer screen (which is an unwanted effect).
Some programs may allow you to use cmd+scroll to zoom in or out (it works in Firefox at least)