Has discretes/learned/macro commands for: 2x Back/Fwd; 4x Back/Fwd; 16x Back/Fwd; 100x Back/Fwd; Factory Reset; LG Pluge Screen; EEPROM Edit Screen. Upconvert mapped to Guide, Last mapped to Prev Ch, and Skip +/- mapped to CH+/-. Tested on the LG which I have, but the Zenith is the same model and should work fine.