If you plan to have a delayed reveal for NFTs minted during your drop, you can add a pre-reveal image. This image will show on the item page for each NFT in your collection until you upload and publish your final asset metadata onchain.
Click on the Pre-Reveal Media section to upload your image.
Setting, or changing, your pre-reveal image requires an onchain transaction, which costs gas.
You can also optionally add a description to all of your items.
Once you’ve updated your Settings, Earnings, and Pre-Reveal Media, click Publish Changes to publish your drop.
From here, your next steps are to upload your media and metadata files and build your drop page.