There will be multiple answers to any Beyond the Manual settings question, but search is your answer! Do be sure to read (or at least scan) through the thread because frequently the answer isn’t at the very top 
https://community.glowforge.com/search?q=slate%20%23beyond-the-manual%20order%3Alatest
Pretty sure I ended up using @danielle.r.richards’s (from @scooterdup’s post) with no shellac or anything: