Mcedit isn’t the choice of everyone. It’s quite hard to copy & paste text with mcedit, so I wanted to use nano for the F4 key’s job. You can easily change the editor seperately for each user by setting the EDITOR variable:
export EDITOR="nano"
In addition you have to disable the internal mcedit editor by editing the midnight commander’s ini file in the user’s home directory, say the: ~/.mc/ini file:
use_internal_edit=0
Ampere's Blog 
looking this one thx
LikeLike