Gail - Was just setting up my new 5D Mkii and realized I need to do this and instead of consulting the manual, I thought, let me see what MJ has said about this! hahaha...Love you for always being SO helpful for the rest of us!

Lizzie Kimball - Thanks so much Melissa! I'm getting my new camera setup and I had to track this post down because I knew it was here somewhere! Thanks again! :)

Barbara Bingham - Thank you SO much for posting this. I had been trying to figure it out on my own after I upgraded from the 5D.

Jovana - Wow.. this has helped me soo much! I just found your blog and love it!

Shelia Stone - OMG! You have no idea how frustrated I have been. I upgraded to the Mark II about 4 months ago and have had to change the way I shoot because the back focus would not work! I looked everywhere to figure it out and just could not! On the 5D I always did back focusing. Thank you thank you thank you for posting about this! Huge frustration saver!

Christina LeMarr - I love using it! Ever since I read your post about it a couple months ago I'm hooked!! Love it!! Thank you soo much for the tip!!

johnwaire | photo - still have to try this. thanks for the reminder :)

Casey Figlewicz - Melissa you ROCK!! I might make myself look stupid here but I read online and off line directions and I could not figure that out until you just explained it. Thanks!!

Susan - Thank you! I hadn't been able to figure it out with the manual so, your post was perfect timing! :) Thanks!

olivia - Have fun! Can't wait to see your test pix ... :-)

Jeanette Sanchez - I love to shoot with the * back button, thanks to you I'll know how to set it up when I get my Mark II, thanks!

PROARTFOTO - Mellisa very excited about your new 5D MK2, I am sure you will put it to good use :-) Back button focus is very useful once you get used to. Thank you for sharing all this helpful information.