Sculpt mode

This is a requested feature: "As suggested; here's a formal request for Jmol to include something akin to Chime's 'Sculpt' mode. The feature enables parts of a molecule to be dragged to new conformations within realistic constraints e.g. Non-rotation of double bonds, steric hindrance, etc. I find it an extremely useful feature for my students to explore conformations." - Ewen McLaughlin