Control dimmer using push button

Hi everyone, newbie here! Got my Homey Pro working with a bunch of switches, made a few simple flows that actually work and make me feel happy.

Now I’m experimenting with a Robb smarrt 4 button wall unit. Works fine for switching things on and off. But I now want one pair of buttons to control a dimmable light, using an Everspring AD147 dimmer plug (and later maybe a Fibaro dimmer for another light).

For each of the buttons In the wall unit’s ‘Scene activated’ card I can choose between

  • ‘pressed once’-
  • ‘pressed longer’
  • ‘released’.

I want to dim, so I go for ‘pressed longer’. But what to do next? In the ‘Then…’ section the dimmer gives me five cards to choose from:

  • Dim to…
  • Relative dimming level…
  • Switch on
  • Switch off
  • Switch on/off

Should be the first or second, I presume. But in both I have to enter a number. And what I want is the value to step up or down until the button is released. Can’t think of a way to get that done…

Help very much appreciated!

(All options mentioned I have translated from Dutch; don’t know the English versions. Let me know if you want to help me and need screenshots.)