Several keys along the bottom row of the Samsung Epix's keyboard have both an obvious function (indicated by an icon) for quick-access to some feature as well as a second function you get when you press and hold the key.

From left to right on the keypad, they are:

Caps/shift: press once to capitalize the next letter you type. Press and hold to enact CAPS LOCK.

MEdia Net: short press launches MEdia Net, long press activates Voice Command (if that feature is enabled)

Symbol/Space bar: short tap on text-entry gets you a space, long press brings up symbols you can insert. A nice perk is that in the Today screen, the symbol/space key brings up the phone.

Camera: short press launches the camera. In other applications, though, a long press brings you into Zoom mode, increasing the size of the text or image you're viewing. To leave zoom mode, press the camera key again.

And, one row up, just above the Caps/shift key, the Fn key behaves similarly-press once for the symbol on the next key you type or press and hold to enter a all number and symbols.

Holding down the Fn key and one letter on the Samsung Epix gets you ready access to wireless, shopping, video and more.

Here's a primer:

 

Fn+B turn on Bluetooth

 

Fn+C launch AT&T Mall

 

Fn+H launch headset manager

 

Fn+M launch AT&T Music

 

Fn+W launch MEdia Net

 

Fn+V launch cellular video

 

Fn+N toggles between optical mouse and 4-way navigation with touch pad