I searched throughout the entire Montage Reference manual, but I wasn't able to find a chapter where user arpeggios creation is explained.
Must Arpeggio Making 101 series be considered as a Montage Reference manual expansion?
There are a lot of subjects that are not covered.
You will not find it in the Reference Manual because it was a feature added in firmware 1.20.x. Please see the Supplementary Manual - the latest version, “montage_en_nf_e0” (which includes all firmware updates through 2.00) the ‘new feature’ is described on page 43 “Put Track to Arpeggio”.
It does assume much as this has been a Yamaha feature for more than two decades. If you get stuck or have specific questions, we’ll attempt to help you here, in the forum.
Thanks Bad Mister I'm simply an idiot... 😀 I should have already known that supplementary manuals are made to implement missing features...