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Part III. Illumination Chapter 11. Shinies http://www.arcsynthesis.org/gltut/Illumination/Tutorial%2011.html
I,J,K,L - control the light's position. Holding SHIFT with these keys will move in smaller increments. SPACE - toggle between drawing the uncolored cylinder and the colored one. U,O - control the specular value. They raise and low the specular exponent. Using SHIFT in combination with them will raise/lower the exponent by smaller amounts. Y - toggle the drawing of the light source. T - toggle between the scaled and unscaled cylinder. B - toggle the light's rotation on/off. G - toggle between a diffuse color of (1, 1, 1) and a darker diffuse color of (0.2, 0.2, 0.2). H - switch between Blinn and Phong specular. Pressing SHIFT+H will switch between diffuse+specular and specular only.
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