Well, on the non-windows scopes (at least on the LT series) you can actually delete option keys easily via the maintenance menu:
MAINTENANCE MENU
- Exit any menu.
- Press and hold 3rd menu key AUTO SETUP being key 1)
- Press and hold 4th menu key, 3rd still held.
- Press and hold 5th menu key, 3rd and 4th still held.
- Release only 3rd menu key, leave 4th and 5th still held.
- Release all keys
- Press 6th menu key
- * Sometimes if you get the wrong sequence the scope will
not react to the right one for some time, try
bringing-up any menu then exiting. (i.e: "Timebase setup"
key -> "Return" key and retry above 3,4,5 sequence.)
That menus has A LOT of functionality, be careful not to upset something badly...
Roberto EB4EQA