diff --git a/srcs/juloo.keyboard2/ExtraKeyCheckBoxPreference.java b/srcs/juloo.keyboard2/ExtraKeyCheckBoxPreference.java
index e66c2cc..c75ed08 100644
--- a/srcs/juloo.keyboard2/ExtraKeyCheckBoxPreference.java
+++ b/srcs/juloo.keyboard2/ExtraKeyCheckBoxPreference.java
@@ -57,10 +57,14 @@ public class ExtraKeyCheckBoxPreference extends CheckBoxPreference
     int index = a.getInteger(R.styleable.ExtraKeyCheckBoxPreference_index, 0);
     a.recycle();
     String key_name = extra_keys[index];
+    KeyValue kv = KeyValue.getKeyByName(key_name);
+    String title = kv.getString();
+    String descr = KeyValue.getKeyDescription(key_name);
+    if (descr != null)
+      title += " (" + descr + ")";
     setKey(pref_key_of_key_name(key_name));
     setDefaultValue(default_checked(key_name));
-    KeyValue kv = KeyValue.getKeyByName(key_name);
-    setTitle(kv.getString());
+    setTitle(title);
     _key_font = kv.hasFlags(KeyValue.FLAG_KEY_FONT);
   }
 
diff --git a/srcs/juloo.keyboard2/KeyValue.java b/srcs/juloo.keyboard2/KeyValue.java
index d6e1ce8..0587278 100644
--- a/srcs/juloo.keyboard2/KeyValue.java
+++ b/srcs/juloo.keyboard2/KeyValue.java
@@ -342,6 +342,25 @@ final class KeyValue
     addPlaceholderKey("f12_placeholder");
   }
 
+  static final HashMap<String, String> keys_descr = new HashMap<String, String>();
+
+  /* Some keys have a description attached. Return [null] if otherwise. */
+  public static String getKeyDescription(String name)
+  {
+    return keys_descr.get(name);
+  }
+
+  static void addKeyDescr(String name, String descr)
+  {
+    keys_descr.put(name, descr);
+  }
+
+  static {
+    /* Keys description is shown in the settings. */
+    addKeyDescr("capslock", "Caps lock");
+    addKeyDescr("switch_greekmath", "Greek & math symbols");
+  }
+
   // Substitute for [assert], which has no effect on Android.
   private static void check(boolean b)
   {