The Meaning of Scheme

DrScheme's definitions window can be used as a plain text editor to write down step-by-step evaluations. The cut and paste functions, available from the menu or through the usual key bindings, make it easy to copy the expression from one step as a starting point for the next step. DrScheme also provides special Scheme-specific editing commands for manipulating expressions:

``ESC-right'' means ``push the ESC key, let go, and then push the right arrow key.''