IDOC - Display
In some cases it is necessary to toggle a node’s visibility to get visual access to underlying objects or particles. "Display" helps you to manage viewport representation.
Visible
To hide the currently selected node, choose “No” from the drop down menu. "Yes" makes it visible again.
Transparency
Yes, even an IDOC node can be shaded and made to obey your settings under the "View" menu. With this parameter you can adjust the required amount of transparency. Higher settings create more transparency. The range goes from 0.0 to 1.0.