The Timeline / Multiple resources view options seem to be unavailable, at least in the current Scheduler version (3.0). Timeline could eventually be obtained by making a new custom field, Type -> Select list -> Time line second scale ON. On needs to define then the Description field as Timeline. However this looks a bit awkward as the Timeline view should rather appear well defined in Settings->Modes. In addition, the Multiple resources view is absolutely impossible to get. This doesn't seem to be a limitation of the standard (free) version, as mentioned at:
there is a note saying: "NOTE: The PRO Edition is available under the Enterprise License and supports one additional feature: the ability to display multiple scheduler instances on a page".