1 files changed, 13 insertions, 0 deletions

diff --git a/src/controller/keyboard.c b/src/controller/keyboard.c
index c6e3c48..333e2d4 100644
--- a/src/controller/keyboard.c
+++ b/src/controller/keyboard.c
@@ -1,6 +1,9 @@
 #include "keyboard.h"
 #include "clear_selection.h"
 #include "selection_from_db.h"
+#include "../view/exp004state0.h"
+
+#define S exp004state0
 
 void
 keyboard (unsigned char key, int x, int y)
@@ -22,6 +25,16 @@ keyboard (unsigned char key, int x, int y)
        */
       selection_from_db ();
       break;
+
+    case 'z':
+      /*
+       * Toggle zoom mode on and off.
+       */
+      if (S.zoom)
+        S.zoom = false;
+      else
+        S.zoom = true;
+      break;
     }
 
   return;