I'm sure this will be blindingly obvious as soon as I see it but how do I add grids to the favorites list in the navigation pane?

I've tried:

• Right-click "favorites" header in navigation pane

• Drag tab to navigation pane

• Right-click grid tab (no option to add to favorites)

• Manage grids>right-click grid (no option to add to favorites)

• Manage grids>options

• Grid pulldown menu

• User manual; Google search> InfoQube grid favorite; forum threads

I give up.  Where is it staring me in the face?

Wayne