The Plaid program puts up a scrollable command window. The user enters commands into this window and most output is displayed into this window.
Typing quit or exit causes Plaid to terminate. Typing help or ? causes a list of the available commands to be typed out.
sink filename directs output to the named file, where it can be imported by other programs. Some further commands below are specifically geared to writing out raw data in a format suitable for producing color images.
source filename reads input from the named file. Keeping commands in an input file makes it easier to document and reuse data analyses. A source command without a filename returns the input focus to the console.