User Activity

A lot of questions on my 70D now, but bare with me, after this I will be quiet (for a while)...  I´m wondering about the two buttons for AF.I can´t really figure out what´s the difference between them.I have read the manual, but no... I just use the ...
Hi there!Another question about my 70D.I have a left over Metz 44 flash for Olympus/Panasonic.Can I use it in manual mode on my camera, or will I destroy something?
Is there someone who knows if it's possible to assign whitebalance to one of the functionkeys on 70D