mtr sequence

Hello,

I am trying to make a long sequence of events for the object mtr. I would like to Record it in several sessions.

Somebody knows how could I make it?
I thounght about editing the content of the mtr, but i just can’t acces to it.

If I record something there, how can I later get that list in order to edit it?

I would be so thankful if anybody could help.
Sabina.