As well as all the good points in favour of the Harmony, it has some silly ones too, and this is one of the silliest. What on earth made them insist on that detail before they would present the coloured circles - which are feeble substitutes for real colour buttons anyway?

andrew: You allocate them in Activities> Watch TV (or whatever)> Customise buttons. They are provided only for TVs and certain other devices that are used for changing channels.