You retype by holding the number (1-6) corresponding to your needed type while moving the power switch to On. That's easy. More difficult is to know if retyping is the right thing to do.

HD621, G98DH, G68ADV, Bc Acoustiqe ACT A3, 5200C DSP33, NuForce Reference 9 monoblocks, 2x SB3's, Velodyne DD-15 & DD-12 Subwoofers and a Meridian sub.