The Canon Rebel T6i lets you set a custom white balance based on the current lighting, and takes only a few moments to set up. Here’s how to do that: In order for a custom white balance to be set, the Canon T6i requires a reference photo. This reference photo needs to be an that is as uniformly white as possible. In the lighting that you wish to set your white balance for (wherever your subject will be, such as under studio lighting or in sunlight): Place a white sheet of paper or, preferably, an 18% gray card. Set your camera to Auto White Balance. Take a photo of the paper or gray card that is uniformly lit and fills as much of the frame as possible. Open the Custom White Balance menu in the third tab of the Settings menu. This menu will automatically display photos on the card that are compatible to use with setting the custom white balance. Scroll through the photos by either swiping on the touch screen, or using the selector wheel. When your chosen photo is on screen, either click the Set button or tap on SET on screen, then select OK. Press the WB/Up button, or go to White Balance in Quick Settings and select the Custom option to use the white balance settings captured from the reference photo.