"Prefer:": This is used by the UI to allow select prefer dimension side.

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 23.0.0.0 (23.1.0.0)

Syntax

C#
`public static ForgeTypeId PreferDimSideUiFilter { get; }`

Visual Basic
`Public Shared ReadOnly Property PreferDimSideUiFilter As ForgeTypeId Get`

Visual C++
`public: static property ForgeTypeId^ PreferDimSideUiFilter { ForgeTypeId^ get (); }`

See Also