changing accounts while composing a message

[cezar]

Hello,

  I am using Gnus to handle multiple accounts so I would like to be
  able, to switch accounts easily while in the middle of writing a
  message cause it happens a lot that I type my message and realise the
  the From: line and signature are wrong, so I need to go and edit them
  manually. Is there a easier/quicker way to switch accounts ?

Regards,
Cezar