I have found (when using only touchscreen/VNC) that the only way to access the Zynseq menu is with either the keyboard ‘i’ shortcut or midi C4.
See below for some sections of the wiki regarding these interactions. I have experimented with CUIA controls with USB computer keyboard and midi controller but I still don’t fully understand the logic of how all the controls map to the interface. It doesn’t always do what you expect based on the control name.
One reason is probably that the CUIA section of the user guide has fallen out of date a bit (I realised after peeking at the code), it’s mostly still correct though. I want to have a go at updating that. It could also use some elaboration of what the controls actually do from someone more knowledgeable than myself.
https://wiki.zynthian.org/index.php/Using_ZynSeq#Menus_and_Parameters
https://wiki.zynthian.org/index.php/Zynthian_UI_Users_Guide#CUIA:_Callable_UI_Actions
I was going to reply to this post: Shortcut (CUIA / OSC) to quickly switch to sequencer or other pages? as I experimented with setting all the different view controls to my nanokontrol 2 midi device but it wasn’t working as expected. That’s when I thought to check the code…