Ctrl(Cmd on MAC) + Left(Mouse)Click on the panel.
Ctrl(Cmd on MAC) + Shift + Left(Mouse)Click on the panel.
If this operation is successful, it will say so in the info line at the bottom of the SV window.
(Mouse)Right-Click and select the bookmark in the popup list.
Locate the mouse point on the plot to highlight and (Mouse) Right Click to bring up the full menu.