Mathematica's unified symbolic graphics architecture makes possible powerful mixing of programmatic graphics generation with interactive editing and control. The
Mathematica Drawing Tools palette makes it straightforward to modify existing plots or illustrations—or to create free-form ones from scratch.
Ctrl+1 — create a new empty graphic
Multiclick — select subparts of groups and insets
Shift+Drag — resize changing aspect ratio
Manipulate — create a complete framework for interactive graphics
Locator — interactively movable control point
— make a copied graphic evaluatable
