To view Memory Channel names:
1:
Long press the Main key until only one band is visible. This is a toggle. So, if you see two bands, long press again to show only one band.
2:
Short press the V/M key to ensure you are in Memory mode. This is a toggle. Short press until MR is displayed.
3:
Short press the MonF key, then press the Main key. This toggles showing large characters vs name tags.