From how many points and where you can activate a scenario? What is an internal button and an external button?

The scenario can be recalled through the control unit (there are 4 Internal buttons) or via various external buttons (push or rocker buttons of the home automation system or IR receivers via 01849 remote controls) that can be associated with the scenario. If you have a device with 2 rocker buttons available, you can set it so that rocker button actives one scenario if it is pressed on the upper side, and a second scenario, if it is pressed on the lower side. A scenario activation button (for example the upper part of a rocker button) can activate only one scenario. A scenario can have multiple activation buttons.