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Particularly useful when working for platforms with non-linear palettes. For example the Thomson TO8 has a Gamma correction of 2.8, so the darkest shade of color is already very bright. It is important to take this into account when drawing pictures to avoid bad surprises when showing them on the real machine. The setting is available from the command line, or from the extended palette window, which gets a little relayout using horizontal sliders now that these are available.