When you first log in, your camera will be positioned behind your avatar in third-person view. You can control your camera with the following key and mouse button combinations.
Alt + click the right mouse button (RMB).
The camera will focus on your cursor's current position.
Mouse scroll wheel.
The camera will zoom in and out on the current focus point.
Hold RMB down and move the mouse.
The camera will orbit around the current focus point if you move the mouse from side to side. It will zoom in if you move the mouse forward and back.
Hold Ctrl + RMB and move the mouse.
The camera will pan and tilt around the current focus point.
Hold Shift + Ctrl + RMB and move the mouse.
The camera will pan side to side or up and down while
maintaining the current focus point.
The camera will return to its third-person starting point.
Hint: Sometimes when you use the Esc key to return the camera to its default position, you'll find that you're zoomed out from your avatar. You can use the mouse scroll wheel to zoom in on your avatar again.
Fly cam: Fly cam is another useful way to explore your surroundings. To enable it, hold down your right mouse button. You can then use the A and D keys to pan from side, the R and C keys to pan up and down, and the W and S keys to zoom in and out. You can also orbit items in this mode by moving your mouse.