For the Canon, it looks like
pages 86 and 87 in the
Camera User Guide are what you need.
Note that the top dial on the back of the camera needs to be set at "camera M" for "Manual" mode. (In Auto mode, the camera does everything for you and you can't customize much of anything.)
Similar to what Doug said, scroll through the various white balance modes and compare the different "looks". If one looks better than the others for your setup, choose it and use it.
If you'd like to try the Custom setting (just to see if it's better than any of the "pre-set" ones) go to page 87. Follow the few steps exactly, and you'll be golden.
IMPORTANT: If you're like me, you will forget to set the White Balance back to AWB (Auto White Balance) for regular snapshots. The easiest thing to do is turn the top dial on the back of the camera back to "camera" (Auto) mode. If you always shoot your woodworking projects under the same conditions, just turn the dial to "camera M" for that, and back to "camera" when you're done.

The last 3 cameras I bought have been PowerShots - an A520, an A540 and an A590IS. That's why I checked the Canon manual. If you'd like me to investigate the Olympus, let me know.
BTW, 3 other tips:
- Use a tripod! (Even a pocket-sized one.)
- For close-ups (within, say, 16 inches) press the "flower" button to use "macro" mode and keep the focus sharp.
- Use the 2-second self-timer to eliminate the camera shake that occurs when you press the shutter button to take the picture -- especially in low light. (See page 62.)