Google Earth Side Panel Controls keyboard shortcuts keys

Shortcut                                                              Command
Spacebar	Select - Toggles the check mark of the highlighted item on or off, showing or hiding display of the item in the 3D viewer.
Down arrow	Next - Selects the next item in the list (either folder or placemark).
Up arrow	Previous - Selects the previous item in the list (either folder or placemark).
Right arrow	Open Folder - If the item selected is a folder, opens the folder to display contents.
Left arrow	Close Folder - If the item selected is a folder, closes it to hide contents from the list view.
Delete Key	Delete - Works only for items in Places pane. Deletes item after confirmation dialog is accepted.
Scroll wheel	Change overlay opacity - Changes the transparency for an overlay selected in the Places pane when the mouse pointer is positioned on the overlay opacity slider. Scroll UP to make the overlay image more opaque, scroll DOWN to make the overlay more transparent.