About the scissors tool in the Segment Editor, how to make the edge of the scissors be a relatively smooth line,Scissors can cut round shapes，But I want to crop any smooth arc.
There are many tools in Slicer that allows you to do something like this.
For example, you can use Surface cut effect (in SegmentEditorExtraEffects extension) for defining a smooth cutting surface.
You can also use Baffle planner module (in SlicerHeart extension) to create a cutting surface that you can import into a segmentation (by drag-and-dropping the model into the segmentation).
It could be nice to have a combination of Draw+Scissors effect. Would you be interested in implementing it? We can help you getting started.
