Is there a "fit" function for the waveviewer in xschem? After I zoom in/out/up/down on plots, I don't seem to be able to get back to the original unzoomed view with a single click. I have to unzoom in/unzoom out/etc. Be great if there was some shortcut to get back to the original view (like in the schematic viewer, I can zoom in / out all day and then by pressing 'f' always get back to the original view).