Thanks a lot Guillaume for your answers.
I use an Apple Magicmouse on a MacBookPro, but the same problem happens also with other mouses on other Macs. When clicking one IanniX interface to add points to a spline or a « smooth curve », it happens all the time that I cannot release my finger early enough and that IanniX creates several points instead of a sigle one.
In the same kind of idea, the magic mouse lateral movement switches very fast between the inspector tabs. I then have to disable this command in my mouse settings, otherwise it is impossible to work with Iannix. Could it me 10 or 100 time slower ?

Best regards
Roland