And the tiniest edit to make the X-Y oscilloscope image appear in the doc.
The chanOsc images needed an update because things moved a little. The rest... is entirely because I wanted to see rounded window corners so there aren't ugly black corners when displayed on the white background of HTML or PDF.
With all the newly aligned labels, and a few things I noticed could use slight improvement...
I might revisit all of this later to try and improve clarity. Suggestions welcome!