Your TRMNL shipment may include a pre-cut screen protector. This is included in all crowdfunded pre-orders, as well as all orders with the "Clarity Kit" add-on.
This small bonus is an anti-glare film, designed to reduce light refraction on devices placed in direct sunlight. Applying this accessory is totally optional, and we suggest testing your device in its desired location to determine if you need it at all.
To apply the anti-glare film you have a couple options:
Carefully place it on your device screen as-is, using the alcohol wipe and micrifiber cloth to remove dust and improve adherence.
Dissassemble your device, remove the screen, and apply it with slightly better accuracy
The benefit of Option 2 is in removing air bubbles following application. Just like adding a screen protector to your phone, you'll want to apply some (gentle) pressure with a sturdy but dull-eged tool to squeeze out the air. Otherwise you may wish you hadn't applied the protector in the first place. ;)