Undo / Unset Values

Once the X and Y values have been set, is there actually a way to make those fields “null” again, without making the change directly in the database?

I know I can just uncheck the Enable Smart Cropping option to “turn it off” but the field is still populated with the previously set values.

It wouldn’t take long to write a small function to just delete _wpsmartcrop_image_focus if Smart Cropping is disabled for that image, but thought I was ask here first in case I was missing something else obvious ??