This parameter will only work if the Permanent or Optional field of the VarDim Type is set to Permanent.
When you set a check mark in this field, the VarDim Type will not be shown in the VarDim Order of the Sales Lines, Purchase Lines or Production Lines.
If you leave this field unchecked, the VarDim Type will be shown in the VarDim Order of the Sales Lines, Purchase Lines or Production Lines but it cannot be edited.