If true, scrollback lines will never be discarded. The scrollback history is stored on disk temporarily, so this may cause the system to run out of disk space if there is a lot of output to the terminal.
Custom color for the foreground of the text character at the terminal’s highlight position, as a color specification (can be HTML-style hex digits, or a color name such as “red”). This is ignored if highlight-colors-set is false.
Possible values are “close” to close the terminal, “restart” to restart the command, and “hold” to keep the terminal open with no command running inside.