This form is opened from the Choice List page of the Standards Designer when you press either the Add or Change buttons.
Variable Choice
Type
From the pulldown list choose Angle, Area, Boolean, Integer, Length, Real, String, Volume or Weight.
Choice
Enter the value that will be returned if this item is selected from the list.
Use dual units
Switch this option on if you wish to use dual units for this return value.
Preview
The pulldown list will contain all the layer names from the current project together with <None>. If you want to display a preview with this choice entry choose the layer that contains that preview. Otherwise choose <None>.