How does gallery mode work on #amethyst ? nostr:nprofile1qqsyvrp9u6p0mfur9dfdru3d853tx9mdjuhkphxuxgfwmryja7zsvhqpzamhxue69uhhv6t5daezumn0wd68yvfwvdhk6tcpz9mhxue69uhkummnw3ezuamfdejj7qgwwaehxw309ahx7uewd3hkctcscpyug

I posted a lot of pictures to nostr dot build but nothing shows in the gallery. Do I need to make an account on there? 

 You have to manually add them. Just open the image in full screen, click on the share button and add to gallery.