I have an ADI Pro SE 2/4 and I currently have a pair of active monitors connected through the AES output. If I got an external headphone amp and connected it to the XLR line output, could I toggle between the AES output and the XLR output so that only one line out is active at a time or must all line outputs active at the same time?

I've searched this forum and have found a bunch of answers suggesting that it's not possible:

https://forum.rme-audio.de/viewtopic.php?id=29032
https://forum.rme-audio.de/viewtopic.php?id=30768
https://forum.rme-audio.de/viewtopic.php?id=35307
https://forum.rme-audio.de/viewtopic.php?id=30546

However, I was reading through the manual and in the "Toggle Ph/Line" section, I think it might be?

Here's the snippet for reference:

Toggle Ph/Line
OFF, 1/2, 3/4, 1/2+3/4, All Plugged, Line/Digital. Default: OFF. Activates the ability to toggle mute
between Phones Out, rear Line Out and digital outputs. Pushing the VOLUME knob for half a
second will then switch between loudspeakers connected to the rear and phones plugged into the
front. This function can also be controlled by one of the four function keys via Remap Function
Keys. All Plugged only incorporates the phones output where a plug is detected. Line/Digital
switches between analog Line Out and digital outputs, with Mute v. Ph active also between
Phones and digital outputs.

So if I set "Toggle Ph/Line" to Line/Digital and then hold down the volume knob, will the ADI device switch between the digital outputs and analog outputs?