External |
Indicates whether this parameter should be hidden from the properties palette when it has no value.
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 25.0.0.0 (25.0.0.0)

Property Value
BooleanIf true, the parameter will be hidden from the properties palette when it has no value. If false, the parameter will always be shown in the properties palette, no matter if it has a value or not.

Even when hidden, the parameter can still be accessed directly via the API.
