IK>80-col cards are easy. In DOS, type PR#3 and your display should turn IK>into 80 columns. If you have the card in the AUxillary slot, the aux IK>slot replaces slot three, so PR#3 says "Start output to slot 3" instead IK>of the normal video. IK> IK>To go from 80 to 40, it's some control character and return, like control IK>Q. Control-reset will certainly revert to 40columns.