Board Thread:Technical Updates/@comment-24006128-20200904132900/@comment-1038387-20200907090703

Lytora wrote: Notice the startup time. Choose type "Infobox" and click save:
 * You're not in source mode now

What you're describing is the InfoboxBuilder, the same as on Legacy. You can enter Source if you click the [] in the right bottom corner. It's actually more visible on UCP than it is on Legacy.