Editing Macintosh Programmer's Workshop (section)

===Look and feel===
Functionally, a ''worksheet'' is a cross between a [[text editor]] document and an [[xterm]] window. Each worksheet window is persistently bound to a file. The user may type anything anywhere in the window, including commands, which can be executed via the keyboard's Enter key; command output appears at the insertion point. Unlike an xterm window, an MPW worksheet is always in visual editing mode and can be freely reorganized by its user. Hence a worksheet can be purely a command script or purely a text document or a mixture of the two&mdash;an integrated document describing the history, maintenance procedures and test results of a software project. The commercial [[BBEdit]] text editor retains a feature it calls "shell worksheets" on Mac OS X. The [[Emacs]] text editor provides shell buffers, a similar feature that works across platforms.