Booted up pi3 for the first time, it works !
In the preference menu, keyb/mouse, i changed the keyb to Azerty.
Doing the test with "raspberry" it indeed puts the a in the right place (not "rqspberry")
I wanted to test changing user (via Log out), and since i only have one user (default pi),
i log back in with the password "raspberry". Only it has not remembered the Azerty keyboard,
so i have to accomodate for querty keys.
Once logged in, i checked the keyb/mouse settings immediately, but those were still happily on azerty.
Why the login probs?
(If it's a known prob, sorry, but the forum search does not seem to work at the moment "very busy")