Save Settings to Scene: Use this to save the active section plane and the Skalp Hiddenline Mode setting into the currently selected Scene.
Save Settings to Scene icon is in OK-mode:
An indication that both the active section plane and the Skalp Hiddenline Mode are identical to there respective statuses as stored in the currently selected scene. In effect at this time there is nothing new to save, you scene’s active section plane status and
Skalp hidden line status is considered ‘in sync’. Hence this button is grayed out. If any change to either the active sectionplane or the Skalp Hiddenline Mode is detected this icon will reflect that by being reenabled as a clickable icon (see above).