Graphics Interactivity & Drawing
The Wolfram Language's unified symbolic graphics architecture makes possible powerful mixing of programmatic graphics generation with interactive editing and control. Adding a canvas provides a drawing surface that invokes attached drawing tools when selected. The Wolfram System Drawing Tools palette makes it straightforward to modify existing plots or illustrations—or to create free-form ones from scratch.
Canvas — represent a canvas for free-form drawing
Manipulate — create a complete framework for interactive graphics
Locator — interactively movable control point