thank you pepe, I didn't install the december update I guess, just the january one... going to try.
No luck.
I copied the december update (3 files) on m92 root and launched update, system rebooted.
I then copied (overwrite) the january update (2 files) on m92 root and launched update (no reboot this time).
Still when I open a pdf I have the 2 points zoom but no universal zoom or such. In "preferred application" the mark on "Use old pdf reader" is off. I also se many new option in the zoom for page scrolling (comic mode, scrolling mode, paper mode, auto crop) and zoom (customize zoom) but no universal zoom.
Any hint?