The links on https://www.swissmicros.com/technical are very useful, but their coverage of the Free42 extensions is spotty. I suggest you include a link to the relevant section of the Free42 site ( https://thomasokken.com/free42/#doc ) in SM's DM42 "External User Manuals" list (and perhaps incorporate this information into the DM42 user manual and help files?).
Thanks!
Bob