Changing the Proofing Format

To change the proofing format, select its card in the Story Formats screen and choose Use to Proof Stories from the Story Format top toolbar tab. A "Used for Proofing" sticker will appear on the card to confirm the change. If the Use to Proof Stories button is disabled, the format you've selected is already the proofing format, or the format you've selected is not a proofing format. (In that case, you probably want to set it as your default format instead.)