Greetings: In order to create a variable section sweep in WF2, I draw a few sketches for the spinal and trajectory curves. The sketch features show in the model tree but not in the graphic area. I have to select the sketch in the model tree or rotate (MMB) the part to see these sketches. The sketches disappear again once clicking in an empty space of the graphic window, selecting something else or when the rotation is completed. Is this normal? Thanks for your time and help.