These docs are for an old release.
Info on upgrading to version 2/3
dragOpacity 1.3
The opacity of an event while it is being dragged.
Float/View Option Hash, default:
{
// for agendaWeek and agendaDay
agenda: .5,
// for all other views
'': 1.0
}
Float values range from 0.0 to 1.0.
Specify a single number to affect all views, or a View Option Hash to target specific views (which is what the default does).
A View Option Hash can only be provided in versions 1.4 and later.
Prior to version 1.3, this option was known as eventDragOpacity.