so curve editing or multi curve editing is a minor thing for the max community ?

Have a look at Toshiro's sa.function here

is this what you're after?

kind of but I am searching for something more generic like the curve editor you can find in any 3d or 2d serious program (maya max after...) where you can add/remove/pick/move points (even tangent) ... eventually edit the numeric value of the point eventually you can zoom in/out on both axis and I want to deal with several curve a the same time

I am close to write it myself (only linear for now) if I don't find anything

if I could do like Jsui in Lua (anybody have a lua / maxmsp /gl something ? ) I would have started already programming in js after doing a lot of lua is like walking on one leg

Thanks, Maa