(Re)setting transponder codes
I heard from someone that the following is a "standard procedure" for setting transponder codes:
1. Switch it to Standby
2. Twist in the new squawk code
3. Switch it back to On or Alt
The reason for this was to prevent accidental squawks of 7x00 codes.
I had never heard of this before. The only advice I've been given is to twist in the new squawk code backwards (i.e. from right to left), which at least in the US where the VFR code is 1200, reduces the possibility of accidentally squawking 7x00.
So I'm curious... What do you do? Am I alone in not having heard of this "standard procedure"?