It is quite difficult to move a pre existing point control in the curves editor as unless you click exactly in the point it will create a new one. As as result most of the times we try to move a point we create a new one instead very near to the old one.
The logical behaviour is to allow a invisible interactive wider circle around the point where it will move the point instead create a new one. This won't create problems as it is unlikely anyone one wants intentionally create a point very near to a old one but rather move the old one. Points that are very near create bad curves. This would help to guess what the use wants.
Curves Control points
Moderators: XnTriq, helmut, xnview, Dreamer
Re: Curves Control points
This problem is supposed to be fixed in XnView MP 0.93. Please check and confirm the bug fix here.
Pierre.