The scenario process is the heart of score, its raison d'être.
It allows to sequence the various objects presented before in a non-linear timeline.
When opening score for the first time, the blank document is a root Time interval, the blue line at the top, which
contains a single scenario.
The various edition features of a scenario are detailed in the tutorials.
Sub-scenarios can of course be added :
Full-view and hierarchy
One can go inside sub-scenarios by using the Full-view feature of the interval.
By double-clicking on a interval name, it switches to the main view.