- The control selected on the left can be highlighted in the display and distinguished, otherwise the user would not know which control to compile
- Finally, you can manually drag the coordinates and automatically save them to a file. The next time you open them, they will be the modified coordinates
- It seems that coordinates cannot be read or modified now
Thanks for the good words! All 3 things you mention are already in some way on my TODO:
AD 1 - Yes, selected component should be highlighted – I want to show it exactly like in CGE editor.
AD 2 - Yes, we want to allow dragging the components (UI, transforms) with gizmos. This will also work exactly like CGE editor.
Saving design from inspector is also a cool idea. This will be harder (because at this point, we don’t know what should be “persistent” and what is “temporary”) but for start, we can allow it, and just let users experiment 
AD 3 - Yes, we want to also allow just editing the edit boxes (which includes coordinates) in the inspector.