This toggle turns the display of include file text in the active window on and off. A bullet appears next to the command name on the menu when the toggle is on. Use this command only if your program contains an $INCLUDE metacommand. When Included Lines is on, the include file text appears in high-intensity video following the $INCLUDE metacommand that names it. These displayed lines are read-only. You must load the include file into a dedicated View window to edit them.