Use this command to switch all Doppler traces in all views between colour and monochrome display.
Remember to switch to mono before printing onto a mono printer.
This function reverses the colour coding of the Doppler spectrum. Useful for printing out onto non-colour printers, either to save ink or toner, or to improve the visual appearance.
Use this set the colour of the lowest values to the same colour as the background. This is sometimes useful for printouts in order to either improve the appearance, or to conserve printer ink or toner.