Sketcher Mouse Interaction in Detail

• Dragging on empty space moves sketch around
• Zooming is done by mouse wheel
• Any object can be dragged. Sketcher tries to solve constraints on object drag.
  There is a 'Dumb Mode' when you can drag objects without solving constraints.
  Hold: Ctrl or Command while dragging to enable 'Dumb Mode'. Constraints will be solved on drag stop(mouse button release).
• Circles, Ellipses and EllipticalArcs can be dragged in to modes: default and alternative. Hold: Alt while dragging to enable alternative mode.
  • default: changes only radius of an object
  • alternative: moves the entire object like if it was a segment
• Then a point is added it can be snapped to another point if the mouse pointer is in other point's neighborhood. The coincident constraint is applied automatically in this case.