By default, the Selectable property is True. The Selectable property makes all layer' captions / extra-captions selectable or unselectable. The Grayscale property returns or sets a value that indicates whether the layer is show as grayscale. For instance, you can simulate a disabled layer by changing the layer's Grayscale property on True, and setting the layer's Selectable property on False. The Visible property shows or hides all layer's caption / extra-captions. 

Any of the following properties can be used to display a HTML caption:

• Caption property specifies the caption to be shown on the control's foreground.
• ExtraCaption property specifies any extra caption to be shown on the control's foreground.
• Foreground.Caption specifies the caption to be shown on the layer's foreground.
• Foreground.ExtraCaption specifies any extra caption to be shown on the layer's foreground.