These define the value of the description displayed on KineticaRT.Studio controls.
The description is always displayed on the face of the control. It is normally used in KineticaRT Studio to give a very short description or just a name of the channel that the control is connected to since there is normally not enough space for more than a few words to be permanently displayed on the control.
If the DescriptionSource property is set to Custom then the control will display the value entered in the CustomDescription property, if it is set to Description it will take its value from the connected channels Description property and if set to ToolTip it will take its value from the connected channels Tooltip property.
The value in the Description property is the value actually being used, it cannot be changed directly.