extern ExSelection exsel_active; // active (info/interact) exhibit
extern ExSelection exsel_grab_left, exsel_grab_right; // grabbed on each hand
extern ExSelection exsel_hover; // hover
extern ExSelection exsel_active; // active (info/interact) exhibit
extern ExSelection exsel_grab_left, exsel_grab_right; // grabbed on each hand
extern ExSelection exsel_hover; // hover