Bind two controller buttons to one control (Back+Start to Multitouch)

[InterClaw]

I have Left Touch bound to Back (or Select if you like) and Right Touch bound to Start. To me this is a much more conventient way of using the large touch pad on DS4/DualSense controllers than the tiny Share and Options buttons.

Anyway, one downside with this is that you can't press Back and Start at the same time.

So enter the Multitouch control! But I can't figure out how to get the two controller buttons (namely Back and Select) bound to it.

If I try to record a macro I can only recort keyboard and mouse input. Not controller button presses.
The same thing really for Special Actions. I can only seem to select keyboard or mouse input.

How can I get it to send both Back and Start when I press Multitouch?

(I guess I can accomplish this with AutoHotkey by mapping Multitouch to something unused between F13-F24 and then have that key send Joy7 and Joy8 on the controller in AutoHotkey, but I'd rather solve it within DS4Windows.)

[InterClaw]

(AutoHotkey turned out to be a dead end. It can't send controller commands natively, only detect them and remap them to something else, so the opposite of what I wanted.)

But I don't know what I did wrong before. It's absolutely possible to record controller input in a macro. Since the macro records physical key presses, not whatever you have mapped to your buttons, to get Back and Start, you can thankfully press Create and Options on the DualSense controller, and they will show up as Back and Start respectively in the macro.