A lot of topics were started because users have difficulties to use the non linear speed animation. It leads new users to several misunderstandings for a long time. Last example here : http://www.picturestoexe.com/forums/index.php?showtopic=12818 Or people complain because you have to make a lot clicks if you have a lot of objects/keypoints (and I agree). Last example here : http://www.picturestoexe.com/forums/index.php?showtopic=12841 I already started a topic in the "Ideas and Suggestions" f