O: toggle

Ϊk: toggle variable [on/off]

:

  oӫOΨӳ]wӤH@ǪAѼơC
  P "set variable [on/off]" ۦP, Y [on/off] oٲ, Nu|
]w (ܬP]wۤϤ)C

  Ѽƪ, аѷ "help variables"C

O: variables 
