Another sketcher issue (I cannot find a logical reason of current sketcher TRIM command). Let me explain. make a circle, draw a line fron the center of the circle at a given angle but longer than the circle radius, dimension the angle of the line and, say, the X axis. then TRIM the line up to the circle, the dimension IS LOST!!! SOLVE THIS! ans this is just a poor example. this behaviour occurs everytime you trim something what was previously dimensioned/constrained!