I'm going through open bugs for EOSM so I tested this one.
INFO toggles low-level formatting option (tapping screen also works)
TRASH chooses between keeping ML or deleting (tapping screen still doesn't work)
Note that the ML folder with settings is left on the card after formatting with the remove ML option.
Also note that the [DELETE] in the warning message is a bit confusing as it appears whether you are saving or removing ML. Is [DELETE] supposed to tell the user to use the TRASH button to switch options?
I used this yesterday and [DELETE] sounds strange indeed. This looks like a straight word replace maybe?
Just as a suggestion, in platform/EOSM.202/consts.h Line 130 change:
#define FORMAT_BTN_NAME "[DELETE]"
#define FORMAT_BTN_NAME "[Trash Button]"
It is not ideal but at least it directs the user to the right button.
After a little more thought I modified it to "[Trash to Change]", the description cannot contain any more characters on the line. I tried doing a screen capture but it would only show the default Canon format menu. You'll have to take my word for it that it fits.