What is the UI mode mean in Amethyst?

Also, how do I preserve these settings nostr:nprofile1qqsyvrp9u6p0mfur9dfdru3d853tx9mdjuhkphxuxgfwmryja7zsvhqpzamhxue69uhhv6t5daezumn0wd68yvfwvdhk6tcpzpmhxue69uhkummnw3ezumt0d5hszythwden5te0dehhxarj9emkjmn99uwfvhl6 so they persistent across updates or devices? I didn't see a settings back up or I may have missed it somehow