Test

This command graphically tests or presents terminal and palette capabilities.

Syntax:

test {terminal | palette}

test or test terminal creates a display of line and point styles and other useful things supported by the terminal you are currently using.

test palette plots profiles of R(z),G(z),B(z), where 0<=z<=1. These are the RGB components of the current color palette. It also plots the apparent net intensity as calculated using NTSC coefficients to map RGB onto a grayscale. The profile values are also loaded into a datablock named $PALETTE.