Here is a clip from my notes on my 71a and the menu things I changed. 
You'll notice I changed 3 of the microphone function keys as well as some 
other things.

Here are the things I change in my radios.
       009 Note 1 CON.REC Conversation recording OFF/ ON OFF 79
changed to on
       201 RECALL Memory channel recall method ALL/ CURRENT ALL 34
changed to current
       202 Note 3 L.OUT Memory channel lockout OFF/ ON OFF 44
haven't locked anything out yet.
       403 Note 2 RPT.MOD Repeater mode CROSS/ A-TX/ B-TX CROSS 81
left this in cross mode.
       405 Note 2 RPT.ID Repeater ID registration Up to 6 characters  82
set my call on the one in the house.
       406 Note 2 ID.TX Repeater ID transmission OFF/ MORSE/ VOICE OFF 82
changed this to morse in the house
       501 BRIGHT Display brightness OFF/ 1 ~ 8 8 62
changed this to 4.
       507 PF1 PF1 key programmable function value See reference page 
FR.BAND 66
       508 PF2 PF2 key programmable function value See reference page CTRL 
66
       509 MIC.PF1 Microphone PF1 key programmable function value See 
reference
       page A/B 66
this is the delta or Dkey, bottom right. changed to enter
       510 MIC.PF2 Microphone PF2 key programmable function value See 
reference
       page MR 66
       511 MIC.PF3 Microphone PF3 key programmable function value See 
reference
       page VFO 66
changed to vgs for recorder, this is the bravo or b key.
       512 MIC.PF4 Microphone PF4 key programmable function value See 
reference
       page CALL (K/ M4 types)
       1750 (E types) 66
this is the a or alpha key, changed to voice.
       514 SC.RESM Scan resume method TO/ CO/ SEEK TO 43
changed to co for carrier
       516 APO Auto Power Off time OFF/ 30/ 60/ 90/ 120/ 180 (minutes) 180 
67
       521 AUTO.PM Automatic PM entry OFF/ ON ON 41
   changed to off in house


73
Butch Bussen
wa0vjr
open Node 3148
Las Vegas