If you edit a form and then press edit the field it shows this screen, but make sure you have saved your form already because…
If you press ESC while on this screen it will exit form editing without saving the changes to your form. 😶😯😕😲🤯💀 It won't even ask if you want to save the changes to your form. It DOES prompt you to save changes if you press ESC but do not have the "Edit Field" window open.
As someone who habitually presses the ESC key to exit out of the current window in Smartsheet, I've lost quite a bit of work due to this "Feature."
Although my best guess is that it's less a "feature" and more a "bug" that I'm reporting. I don't think you intended the form editing to work this way. But if you did, here's my feature request.