My suggestion is to add a function "undo" to the Nextion editor.
"Undo" is in the schedule.
I am now reviewing all of the Feature Requests, this will take some time, patience please.
1) Undo - has been implemented
2) More access to elements via ardiuino - partial implemented and ongoing
3) On/Off - has been implemented with the vis command
4) Return objname - carries
5) Elements checkboxes and radio buttons - implemented
Effects - carries.