QUOTE
'double tap' with one finger it will zoom in or out
Have no idea what you're talking about. Nothing in "Mouse" on my setup concerns the Magic Pad, maybe on my wife's MBP. OTOH, two-figner, double-tapping on the Pad acts exactly the same as it does on my iDevices: Zoom Out/In.
OTOH, there is a place in Trackpad for setting the "Secondary click", which can be defined in Mouse, I guess... Frankly, I had forgot about zooming with the two-finger, pinch/spread action, thanks for helping me start using that again, it's faster than command-+/- and is 'infinitely' variable. 
OT(third)H, there is a spot in Accessibility for Mouse and Trackpad settings. So, if you have stuff in the regular Mouse pref, it seems Apple has fallen, once again, into slapping things where ever the current favorite place might be for any particular day!
I'm not sure what to call it, or what version of MAC OS it began with but I'm getting tired of using to touchpad to move the cursor and having the entire screen zoom-out to show me a choice of windows to click on. I don't like this feature, it doesn't happen as easily with a real mouse/trackball hooked up and I suppose this is a "gesture" but I don't mind saying it's wasted on me and I wouldn't see myself using such a feature. It's early so if this "question" isn't worded correctly please ignore it or ask questions!
gunug, is this possibly the "Mission Control" feature? On my laptop, that is the command for MC. You should find the selection in the trackpad settings in system prefs.