Can I show a context menu when the user right-clicks on an open space in the Scheduler?

Yes, this is possible - you need to assign the context menu to ContextMenuSelection:

<%= Html.DayPilotScheduler("dps", new DayPilotSchedulerConfig {
  BackendUrl = ResolveUrl("~/Scheduler/Backend"),
  ...
  ContextMenuSelection = "rmenu"
})%>

Dan, I tried the above but with no success.

@Html.DayPilotScheduler("dps", new DayPilotSchedulerConfig {
ContextMenu = "menu",
ContextMenuSelection = "menu",
...
}

The menu "menu" exists and works well when I right-click on an event, but when I right-click on an empty space in the scheduler no context menu comes up.

I am using DayPilot version 7.3.5519.1

Thanks

Nevermind, it works - I had to change:

TimeRangeSelectedHandling = TimeRangeSelectedHandlingType.Disabled

To:

TimeRangeSelectedHandling = TimeRangeSelectedHandlingType.JavaScript

Thanks, Dan!