I agree the poly/mono stuff is not greatl.
But i think it's part of the preset. When designing a sound, you have in mind whether it's mono or poly, which is why it's in the preset and not in the mixer part.
ah sorry my bad, i thought the midi channel mapping and instrument range where part of the preset as well... it just felt natural to have the poly/mono option also in that midi menu.
about the mono legato stuff let me try to explain:
in many mono synths (moog/waldorf etc.) there are options/modes to handle multiple key presses and options to define the portamento.
portamento:
-either portamento is always on, regardless of what has happened before. this means every note glides from the old note, even if that old note is already off and not sounding anymore this i think was the standard portamento in old times
-portamento is only on when notes overlap, so an old note has to still sound for a new note to be played. this is called fingered portamento in many synths (waldorf etc.)
i think there are even more modes on other synths, but i will have to dig that up.
mono multi key handling:
-some mono synths will always play the lowest pressed note, even if it is an "older" one, i think most old analog mono synths had no concept of old or new note, just a direction in which they scanned their keyboard, which is why it was either lowest or highest note pressed that would sound.
-some monos (as noted above) always play the highest held note, regardless of other newer notes that are lower in pitch
-some monos implement "modern" note handling, meaning that the newest note will get priority, and if you release it, the still held notes are still in order and the one that is then the newest will sound.
it would be great to have these options in the preenfm3, since it is a common feature to use these modes for mono lead/bass sounds.
and these modes are challenging to understand because some of the mono modes actually only work with some of the portamento modes. i.e. fingered portamento only really works well with a mono mode that uses the "modern" note handling.
retrigger in mono mode:
either every new note that comes in triggers the "new note process" envelopes etc. or only notes that are not overlapping trigger the "new note process". this is called retrigger on legato on many synths.