ECML, Help needed with Trackmarks and Session Schedules.

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I,m working on the ECML and need help with two things that are beyond my poor computer skills. In Driver there are so many trackmarks that that can,t all fit on the screen. Now I remember reading somewhere in these forums hat you can put them in groups. For example If I select track marker "New" It will open up a list of all trackmarks starting with "New" But I can,t remember how to do it.
Secondly, I want to edit the train schedules provided for the scenarios But I don,t know where there are kept. POST DUPLICATED IN ERROR. PLEASE IGNORE/DELETE