Difference of Scenario v.s. Session ?

[john259]

I thought if saved as 'Sessions"one can reload them and add on things,whereas any thing saved as a "Scenario" is locked in

Yes that's right, a scenario's program cannot be changed at runtime. However, a scenario creator can, if they wish, offer runtime option choices to the user for example by means of clickable buttons. It is also possible for a scenario to include random choices.

John