As changing sheet names and values can be a pain in the bu7t, I would like to suggest to make these available via M503 and M500 gcodes.
This way we could easy change
This would be a nice advanced-user alternative to #2091
I'm going to attempt to implement this feature on a fork. Stay tuned :-)
I chose not to do M500/3 as that separates a "working memory" value from eeprom values; sheets are always referenced from eeprom so it made more sense to just add a new special code for manipulating sheets one at a time.
Close it as @vintagepc has a good PR and can be discussed there.