#
Program Browsing

DrScheme offers several ways to browse large files.

## Contours

A contour is a extremely shrunken version of the program source -- think of it as ``the view from 20,000 feet''. The Special | Insert Large Letters ... menu entry inserts a comment in ``large'' letters, which helps highlight portions of the source.

## Definitions

At the top-left of the DrScheme window is a button whose label reads

    (define ...)

Clicking on this Definitions button generates a pop-up window that lists all the definitions in the source file.