Type of terminal background. May be "solid" for a solid color, "image" for an image, or "transparent" for either real transparency if a compositing window manager is running, or pseudo-transparency otherwise.
When selecting text by word, sequences of these characters are considered single words. Ranges can be given as "A-Z". Literal hyphen (not expressing a range) should be the first character given.
Whether to have Alt+letter access keys for the menubar. They may interfere with some applications run inside the terminal so it's possible to turn them off.