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Part III. Illumination Chapter 9. Lights On http://www.arcsynthesis.org/gltut/Illumination/Tutorial%2009.html
SPACE - toggle between drawing the uncolored cylinder and the colored one.
LEFT CLICKING and DRAGGING - rotate the camera around the target point, both horizontally and vertically. LEFT CLICKING and DRAGGING + CTRL - rotate the camera around the target point, either horizontally or vertically. LEFT CLICKING and DRAGGING + ALT - change the camera's up direction. RIGHT CLICKING and DRAGGING - rotate the object horizontally and vertically, relative to the current camera view. RIGHT CLICKING and DRAGGING + CTRL - rotate the object horizontally or vertically only, relative to the current camera view. RIGHT CLICKING and DRAGGING + ALT - spin the object. WHEEL SCROLLING - move the camera closer to it's target point or farther away.
@author integeruser