oscilloscope (per-channel)

the "Oscilloscope (per-channel)" window displays several oscilloscope views (one per channel).

oscilloscope per-channel configuration view

right-clicking the view will display the configuration view shown above:

click on OK to return to the main view.

gradient

oscilloscope per-channel gradient configuration view

when enabling the Gradient setting, a gradient view is displayed in where circular "points" can be placed.
each point adds a color spot.
the resulting image is used to look up the waveform's color as determined by each axis.