CONFIG VIDEO OFF | ON
The VIDEO setting will switch the video output on or off. There is a slight performance improvement with the video off but the biggest benefit with VIDEO OFF is that the unused memory is returned to the general memory pool used by strings and arrays. Default is VIDEO ON.
The CONFIG command differs from other options. It permanently reconfigures MMBasic and it only needs to be run once (ie, the setting will be remembered even with the power turned off).
The power must be cycled after changing a setting for it to take effect.