Drag and Drop is the only way to add ui controls in the builder.
It will be great to add controls in a treeview of the pages. This could be the solution for people like me that have to develop several hours through mobile devices.
This is the only gap to full apperyio on mobile development.

It's ok thanks

I am trying to save since 15 minutes ago, but It displays the same error again and again: Oops - an error occurred. Please try again in a few seconds!