User blog comment:Dopp/Meet the Mini Editor/@comment-4777191-20120322223207/@comment-1656630-20120322223327

If you prefer source mode in the main editor, too, you can disable visual mode in your preferences and you'll get a faster load for both experiences. Right now the two are linked, but if (after trying it out for awhile) you find that you'd really want one in visual and the other in source, please write to Special:Contact to tell us about your experience. Thanks!