Grille
panel insect
Shift-d does the same & is a convenient alternative to that mouse-click-maneuver for a tremulous hand when it comes to negotiations with an awfully strong & extremely nasty civ.
The "D" will appear when you have gained the first contact to another civ. Sometimes the "D" appears w/o having met a foreign unit, but reaching their cultural border, thus providing possibility of negotiations.
The "D" will appear when you have gained the first contact to another civ. Sometimes the "D" appears w/o having met a foreign unit, but reaching their cultural border, thus providing possibility of negotiations.