// block types
□ image
jpg/png/gif/webp
?
◈ video/link
youtube/vimeo/direct
?
◇ 3d model
.stl or .obj
?
■ color
hex color code
// info
▸ upload file / enter url → block arms
▸ click grid cell to place
▸ [esc] to disarm
▸ drag also works (desktop)