Rename room option is gone?

I've searched until my eyes bled and nope, the option to rename a room is not there. I did exactly what the help forum said, going to Room Partition, where on the bottom menu bar are only 3 options - Merge, Divide, and Hide - but no 4th option to rename the room as the forum suggests.

I created my first map earlier and had no trouble, but this new map, no bueno. Please help, thank you.

Signed,
Frustrated in North Carolina : )