What should you do after using a gray card to set custom white balance?

• A. Delete the WB shot and rely on auto WB.
• B. Apply the white balance to subsequent photos to achieve consistent color.
• C. Rely on auto WB for the rest of the shoot.
• D. Ignore the card and adjust exposure instead.

Answer: (B)

A gray card gives the camera a neutral reference to set accurate color. After you capture a frame with the gray card and set a custom white balance, that WB value is stored and should be used for all later shots in the same lighting. Applying that same white balance to the subsequent photos keeps color consistent across the shoot, so you don’t get shifts from relying on auto WB. If the lighting changes, re-measure with another gray card and update the custom WB. This approach preserves a neutral baseline rather than letting auto WB guess and drift.