color painting by creality 5.1, how does it work?

hello guys, I have been using creality print 5.1 and I liked it a lot but it catches my attention, the option it comes with to paint certain parts of our models, although I understand that I must add colors and filaments, and I look at the layer and step where it starts the nozzle with the new color I add a pause before the nozzle starts ? to change the filament, but I have done this and nothing happens.

Could someone make a guided video with a lavero-type model that paints specific sections in creality print and this really applies, I find the option interesting but there is no explanation or documentation on how to do it.

because I understand it by gcode pausing and seeing where the nozzle starts with each color, but this process is very rustic, right? what creality print even puts in a purge tower is supposed to be because it automates everything, right?

I would appreciate anyone who makes a video explaining it well, thank you.