Manual white balance

From Page 52, Canon EOS 10D instruction manual --- 1) Shoot a white object. * The white object should fill the entire partial metering circle. * Set any white balance setting. (see p.50) * Shoot the white object so that a standard exposure is obtained. If it is underexposed or overexposed, a correct white balance setting might not be obtained. --- 2) On the menu, select [Custom WB]. * Press the Menu button. * Turn the thumbwheel to select [Custom WB], then press Set. --- 3) Select an image. * Turn the thumbwheel to select the image captured in step 1, then press Set. - The image's white balance data will be imported. * After the setting is completed, the menu will reappear. * To exit the menu and turn off the LCD monitor, press the Menu button. --- 4) Press the AF-WB button. 5) Select the ?custom white balance?. * Turn the thumbwheel to select the custom WB symbol. Notes: - For the standard white object, a sheet of plain, white paper is recommended. - You can store on the CF card the images of the standard white object captured under various lighting. Then while shooting, you can select one of these images with the [Custom WB] menu command to easily set the white balance best suited for the current lighting condition.

Click the AF-WB button and then with the wheel in the back of the camera select either K or any of the other settings. If set to K then you must go to your Menu (click menu button on back) then go to Color temp. and select your Kelvin tempature. Hope that helps....