The most strident instructions we received when we got the Eos were:
1) Always go back to the Live screen (I blew this one off at first, but I'm becoming as rabid as John H.)
and
2) Don't enable Auto Mark. It's better to do your own marks.
I've read the section on marking. Then I read it again. Then I read it with the operator from the other room (who's name is Mark, of course!). Then we tried it together. Then he went to his own room and tried it. I'm ashamed to admit I'm glad he couldn't figure it out either.
In the end I went back to Auto Mark.
O.K. So I bite. What is marking all about? How do you mark a "system" without doing what looks like endless keystrokes? Is it really safer, faster and better to do your own marking?
[As a side note, I now understand why everyone has "talk" looks between numbers. I'm discovering how convenient it is to be able to take all of the movers to home position and start over. Is this considered cheating?]