Questions on MIDI and button patching

After too long I’m finally going to do a live show with my Hypno in a few weeks time and I’ve been preparing everything. Elektron Octatrack is my master controller and it’s playing nice with the Hypno using a CME MIDI Bud. I’m very excited to finally leave the laptop at home for a live show and will be triggering videos and modulating the hypno via MIDI.

*First question is on MIDI key assignments and presets. *
The MIDI guide says that notes from C scale (I’m assuming that means white notes) can be assigned to patches. I’ve tried using the black notes and successfully saved presets to those notes. Since they’re simply MIDI note numbers I assumed it would work. The MIDI guide also says that F# G# and A# are intended for controlling the 3 front buttons on the Hypno. However I’ve stored patches using those 3 notes which is great but I didn’t expect it to work.

Question: has something changed since the guide was written and we can now use ‘non-white notes’ to save patches ; are F# G# and A# still reserved for controlling the front buttons and if so is it F# G# and A# in every octave or just a specific octave? ; what about the other black notes: am I creating a problem for myself saving presets using C# D# ?

Ah ! I think I’ve found the answer but pasting it here in case it helps someone else.

While digging in the MIDI section of the manual I spotted the ’ Toggle A Shape’ MIDI Note command which suggests that MIDI Notes 118, 121 and 123 are reserved for the 3 front buttons.

My second question is button patching. From audio synthesis I’m familiar with cross-modulation but I had been trying to figure out how to play only a video on one oscillator while switching off the other oscillator. The video on button patchig says I can do this which is cool but… I’m probably being dumb: I cannot figure out how to do this (pasted from the manual)
Unpatching a shape out of the master output is a great way to quickly mute a shape."
*The video zips past it so quickly I can’t figure out how it’s done.

Question: how do I take a shape out of the output image?*

And again… while digging in the MIDI section of the manual I spotted the ‘Toggle A->Main’ & ‘Toggle B->Main’ MIDI note commands. Which answers my question. Saving it here for anyone who searches in the future.