For changing TG on the the FT3 I follow this procedure (based on above)

1. Single Press the "X" (Wires-X) button on lower left of radio
2. Tap "Search & Direct" on center
3. Again, Tap "Search & Direct" on bottom center
4. Tap "ID" in upper left - a hash should show
5. Enter the TG number using 5 digits.  Example: 00201
6. Tap "ENT" - a message will flash for 4 seconds you will then see green transmit light - your radio will now have already sent a "key up" / "PTT" and will already be in the TG.
7. To get out of "Wires-X" mode press and HOLD the "X" (Wires-X) button on lower left of radio