From Dwarf Fortress Wiki
The Dwarf Fortress interface is made up of several different parts besides the main game area.
- A: Combat, Hunting, and Sparring reports. Press to view these reports. A red C means combat, a green H means hunting, and a blue S means sparring.
- B: The game Menu.
- C: The number of idle dwarves. This may appear at the top right instead of bottom right.
- D: The z-level you are currently viewing.
Above z-level counter column, at top right, there is a moon phase indicator.