diff --git a/java/res/drawable/btn_keyboard_key_gingerbread.xml b/java/res/drawable/btn_keyboard_key_gingerbread.xml
index 24a5479..4a113a8 100644
--- a/java/res/drawable/btn_keyboard_key_gingerbread.xml
+++ b/java/res/drawable/btn_keyboard_key_gingerbread.xml
@@ -16,10 +16,16 @@
 
 <selector xmlns:android="http://schemas.android.com/apk/res/android">
 
+    <!-- Functional keys. -->
+
+    <item android:state_single="true" android:state_pressed="true"
+          android:drawable="@drawable/btn_keyboard_key_dark_pressed" />
+    <item android:state_single="true"
+          android:drawable="@drawable/btn_keyboard_key_dark_normal" />
+
     <!-- Toggle keys. Use checkable/checked state. -->
 
-    <item android:state_checkable="true" android:state_checked="true"
-          android:state_pressed="true"
+    <item android:state_checkable="true" android:state_checked="true" android:state_pressed="true"
           android:drawable="@drawable/btn_keyboard_key_dark_pressed_on" />
     <item android:state_checkable="true" android:state_pressed="true"
           android:drawable="@drawable/btn_keyboard_key_dark_pressed_off" />
diff --git a/java/res/xml/kbd_qwerty.xml b/java/res/xml/kbd_qwerty.xml
index 59c61e4..d7d1ee0 100755
--- a/java/res/xml/kbd_qwerty.xml
+++ b/java/res/xml/kbd_qwerty.xml
@@ -18,6 +18,9 @@
 */
 -->
 
+<!-- TODO: Add settings key to other languages -->
+<!-- TODO: Add modifier attr to functional keys in other languages -->
+
 <Keyboard xmlns:android="http://schemas.android.com/apk/res/android"
     android:keyWidth="10%p"
     android:horizontalGap="0px"
@@ -106,75 +109,75 @@
         <Key android:codes="-5" android:keyIcon="@drawable/sym_keyboard_delete"
                 android:keyWidth="15%p" android:keyEdgeFlags="right"
                 android:iconPreview="@drawable/sym_keyboard_feedback_delete"
-                android:isRepeatable="true"/>
+                android:isRepeatable="true" android:isModifier="true"/>
     </Row>
 
     <Row android:keyboardMode="@+id/mode_normal" android:rowEdgeFlags="bottom">
         <Key android:codes="-2" android:keyLabel="@string/label_symbol_key" 
-                android:keyWidth="15%p" android:keyEdgeFlags="left"/>
+                android:keyWidth="15%p" android:keyEdgeFlags="left" android:isModifier="true"/>
         <Key android:codes="@integer/key_settings" android:keyIcon="@drawable/sym_keyboard_settings"
                 android:iconPreview="@drawable/sym_keyboard_feedback_settings"
-                android:keyWidth="10%p"/>
+                android:keyWidth="10%p" android:isModifier="true"/>
         <Key android:codes="@integer/key_f1" android:keyIcon="@drawable/sym_keyboard_mic"
                 android:iconPreview="@drawable/sym_keyboard_feedback_mic"
-                android:keyWidth="10%p"/>
+                android:keyWidth="10%p" android:isModifier="true"/>
         <Key android:codes="32" android:keyIcon="@drawable/sym_keyboard_space"
                 android:iconPreview="@drawable/sym_keyboard_feedback_space"
-                android:keyWidth="30%p" android:isRepeatable="true"/>
+                android:keyWidth="30%p" android:isRepeatable="true" android:isModifier="true"/>
         <Key android:codes="46" android:keyLabel="." android:popupKeyboard="@xml/popup_punctuation" 
-                android:keyWidth="10%p"/>
+                android:keyWidth="10%p" android:isModifier="true"/>
         <Key android:codes="10" android:keyIcon="@drawable/sym_keyboard_return"
                 android:iconPreview="@drawable/sym_keyboard_feedback_return"
-                android:keyWidth="25%p" android:keyEdgeFlags="right"/>
+                android:keyWidth="25%p" android:keyEdgeFlags="right" android:isModifier="true"/>
     </Row>
 
     <Row android:keyboardMode="@+id/mode_url" android:rowEdgeFlags="bottom">
         <Key android:codes="-2" android:keyLabel="@string/label_symbol_key"
-                android:keyWidth="15%p" android:keyEdgeFlags="left"/>
+                android:keyWidth="15%p" android:keyEdgeFlags="left" android:isModifier="true"/>
         <Key android:codes="@integer/key_settings" android:keyIcon="@drawable/sym_keyboard_settings"
                 android:iconPreview="@drawable/sym_keyboard_feedback_settings"
-                android:keyWidth="10%p"/>
+                android:keyWidth="10%p" android:isModifier="true"/>
         <Key android:keyLabel="/" android:keyWidth="10%p"/>
         <Key android:codes="32" android:keyIcon="@drawable/sym_keyboard_space"
                 android:iconPreview="@drawable/sym_keyboard_feedback_space"
-                android:keyWidth="30%p" android:isRepeatable="true"/>
+                android:keyWidth="30%p" android:isRepeatable="true" android:isModifier="true"/>
         <Key android:keyLabel="." android:popupKeyboard="@xml/popup_punctuation"
-                android:keyWidth="10%p"/>
+                android:keyWidth="10%p" android:isModifier="true"/>
         <Key android:codes="10" android:keyIcon="@drawable/sym_keyboard_return"
                 android:iconPreview="@drawable/sym_keyboard_feedback_return"
-                android:keyWidth="25%p" android:keyEdgeFlags="right"/>
+                android:keyWidth="25%p" android:keyEdgeFlags="right" android:isModifier="true"/>
     </Row>
 
     <Row android:keyboardMode="@+id/mode_email" android:rowEdgeFlags="bottom">
         <Key android:codes="-2" android:keyLabel="@string/label_symbol_key"
-                android:keyWidth="15%p" android:keyEdgeFlags="left"/>
+                android:keyWidth="15%p" android:keyEdgeFlags="left" android:isModifier="true"/>
         <Key android:codes="@integer/key_settings" android:keyIcon="@drawable/sym_keyboard_settings"
                 android:iconPreview="@drawable/sym_keyboard_feedback_settings"
-                android:keyWidth="10%p"/>
+                android:keyWidth="10%p" android:isModifier="true"/>
         <Key android:keyLabel="\@"/>
         <Key android:codes="32" android:keyIcon="@drawable/sym_keyboard_space"
                 android:iconPreview="@drawable/sym_keyboard_feedback_space"
-                android:keyWidth="30%p" android:isRepeatable="true"/>
+                android:keyWidth="30%p" android:isRepeatable="true" android:isModifier="true"/>
         <Key android:keyLabel="." android:popupKeyboard="@xml/popup_punctuation"/>
         <Key android:codes="10" android:keyIcon="@drawable/sym_keyboard_return"
                 android:iconPreview="@drawable/sym_keyboard_feedback_return"
-                android:keyWidth="25%p" android:keyEdgeFlags="right"/>
+                android:keyWidth="25%p" android:keyEdgeFlags="right" android:isModifier="true"/>
     </Row>
 
     <Row android:keyboardMode="@+id/mode_im" android:rowEdgeFlags="bottom">
         <Key android:codes="-2" android:keyLabel="@string/label_symbol_key"
-                android:keyWidth="15%p" android:keyEdgeFlags="left"/>
+                android:keyWidth="15%p" android:keyEdgeFlags="left" android:isModifier="true"/>
         <Key android:codes="@integer/key_settings" android:keyIcon="@drawable/sym_keyboard_settings"
                 android:iconPreview="@drawable/sym_keyboard_feedback_settings"
-                android:keyWidth="10%p"/>
+                android:keyWidth="10%p" android:isModifier="true"/>
         <Key android:codes="@integer/key_f1" android:keyIcon="@drawable/sym_keyboard_mic"
                 android:iconPreview="@drawable/sym_keyboard_feedback_mic"
-                android:keyWidth="10%p"/>
+                android:keyWidth="10%p" android:isModifier="true"/>
         <Key android:codes="32" android:keyIcon="@drawable/sym_keyboard_space"
                 android:iconPreview="@drawable/sym_keyboard_feedback_space"
-                android:keyWidth="30%p" android:isRepeatable="true"/>
+                android:keyWidth="30%p" android:isRepeatable="true" android:isModifier="true"/>
         <Key android:codes="46" android:keyLabel="." android:popupKeyboard="@xml/popup_punctuation" 
-                android:keyWidth="10%p"/>
+                android:keyWidth="10%p" android:isModifier="true"/>
         <Key android:keyLabel=":-)" android:keyOutputText=":-) "
                 android:popupKeyboard="@xml/popup_smileys"
                 android:keyWidth="25%p" android:keyEdgeFlags="right"/>
@@ -182,23 +185,23 @@
 
     <Row android:keyboardMode="@+id/mode_webentry" android:rowEdgeFlags="bottom">
         <Key android:codes="-2" android:keyLabel="@string/label_symbol_key"
-                android:keyWidth="10%p" android:keyEdgeFlags="left"/>
+                android:keyWidth="10%p" android:keyEdgeFlags="left" android:isModifier="true"/>
         <Key android:codes="@integer/key_settings" android:keyIcon="@drawable/sym_keyboard_settings"
                 android:iconPreview="@drawable/sym_keyboard_feedback_settings"
-                android:keyWidth="10%p"/>
+                android:keyWidth="10%p" android:isModifier="true"/>
         <Key android:codes="@integer/key_f1" android:keyIcon="@drawable/sym_keyboard_mic"
                 android:iconPreview="@drawable/sym_keyboard_feedback_mic"
-                android:keyWidth="10%p"/>
+                android:keyWidth="10%p" android:isModifier="true"/>
         <Key android:codes="32" android:keyIcon="@drawable/sym_keyboard_space"
                 android:iconPreview="@drawable/sym_keyboard_feedback_space"
-                android:keyWidth="20%p" android:isRepeatable="true"/>
+                android:keyWidth="20%p" android:isRepeatable="true" android:isModifier="true"/>
         <Key android:codes="9" android:keyIcon="@drawable/sym_keyboard_tab"
                 android:iconPreview="@drawable/sym_keyboard_feedback_tab"
-                android:keyWidth="15%p"/>
+                android:keyWidth="15%p" android:isModifier="true"/>
         <Key android:keyLabel="." android:popupKeyboard="@xml/popup_punctuation"
-                android:keyWidth="10%p"/>
+                android:keyWidth="10%p" android:isModifier="true"/>
         <Key android:codes="10" android:keyIcon="@drawable/sym_keyboard_return"
                 android:iconPreview="@drawable/sym_keyboard_feedback_return"
-                android:keyWidth="15%p" android:keyEdgeFlags="right"/>
+                android:keyWidth="15%p" android:keyEdgeFlags="right" android:isModifier="true"/>
     </Row>
 </Keyboard>
diff --git a/java/res/xml/kbd_qwerty_black.xml b/java/res/xml/kbd_qwerty_black.xml
index 076359c..2865472 100755
--- a/java/res/xml/kbd_qwerty_black.xml
+++ b/java/res/xml/kbd_qwerty_black.xml
@@ -201,5 +201,4 @@
                 android:iconPreview="@drawable/sym_keyboard_feedback_return"
                 android:keyWidth="15%p" android:keyEdgeFlags="right"/>
     </Row>
-
 </Keyboard>
diff --git a/java/res/xml/kbd_symbols.xml b/java/res/xml/kbd_symbols.xml
index 3f6b8ac..fad3ebc 100755
--- a/java/res/xml/kbd_symbols.xml
+++ b/java/res/xml/kbd_symbols.xml
@@ -118,25 +118,25 @@
         />
         <Key android:codes="-5" android:keyIcon="@drawable/sym_keyboard_delete" android:keyWidth="15%p" android:keyEdgeFlags="right"
                 android:iconPreview="@drawable/sym_keyboard_feedback_delete"
-                android:isRepeatable="true"/>
+                android:isRepeatable="true" android:isModifier="true"/>
     </Row>
 
     <Row  android:rowEdgeFlags="bottom">
         <Key android:codes="-2" android:keyLabel="@string/label_alpha_key"
-                android:keyWidth="15%p" android:keyEdgeFlags="left"/>
+                android:keyWidth="15%p" android:keyEdgeFlags="left" android:isModifier="true"/>
         <Key android:codes="@integer/key_settings" android:keyIcon="@drawable/sym_keyboard_settings"
                 android:iconPreview="@drawable/sym_keyboard_feedback_settings"
-                android:keyWidth="10%p"/>
-        <Key android:codes="@integer/key_f1" android:keyWidth="10%p"/>
+                android:keyWidth="10%p" android:isModifier="true"/>
+        <Key android:codes="@integer/key_f1" android:keyWidth="10%p" android:isModifier="true"/>
         <Key android:codes="32" android:keyIcon="@drawable/sym_keyboard_space"
                 android:keyWidth="30%p"
                 android:iconPreview="@drawable/sym_keyboard_feedback_space"
-                android:isRepeatable="true"/>
+                android:isRepeatable="true" android:isModifier="true"/>
         <Key android:codes="46" android:keyLabel="."
                 android:popupKeyboard="@xml/popup_punctuation"
-                android:keyWidth="10%p"/>
+                android:keyWidth="10%p" android:isModifier="true"/>
         <Key android:codes="10" android:keyIcon="@drawable/sym_keyboard_return" android:keyWidth="25%p" android:keyEdgeFlags="right"
                 android:iconPreview="@drawable/sym_keyboard_feedback_return"
-                />
+                android:isModifier="true"/>
     </Row>
 </Keyboard>
diff --git a/java/res/xml/kbd_symbols_shift.xml b/java/res/xml/kbd_symbols_shift.xml
index 0ec4c71..b069391 100755
--- a/java/res/xml/kbd_symbols_shift.xml
+++ b/java/res/xml/kbd_symbols_shift.xml
@@ -85,24 +85,24 @@
         />
         <Key android:codes="-5" android:keyIcon="@drawable/sym_keyboard_delete" android:keyWidth="15%p" android:keyEdgeFlags="right"
                 android:iconPreview="@drawable/sym_keyboard_feedback_delete"
-                android:isRepeatable="true"/>
+                android:isRepeatable="true" android:isModifier="true"/>
     </Row>
     
     <Row android:rowEdgeFlags="bottom">
         <Key android:codes="-2" android:keyLabel="@string/label_alpha_key" android:keyWidth="15%p"
-                android:keyEdgeFlags="left"/>
+                android:keyEdgeFlags="left" android:isModifier="true"/>
         <Key android:codes="@integer/key_settings" android:keyIcon="@drawable/sym_keyboard_settings"
                 android:iconPreview="@drawable/sym_keyboard_feedback_settings"
-                android:keyWidth="10%p"/>
-        <Key android:keyLabel="„" android:keyWidth="10%p" />
+                android:keyWidth="10%p" android:isModifier="true"/>
+        <Key android:keyLabel="„" android:keyWidth="10%p"  android:isModifier="true"/>
         <Key android:codes="32" android:keyIcon="@drawable/sym_keyboard_space"
                 android:keyWidth="30%p"
                 android:iconPreview="@drawable/sym_keyboard_feedback_space"
-                android:isRepeatable="true"/>
-        <Key android:keyLabel="…" android:keyWidth="10%p" />
+                android:isRepeatable="true" android:isModifier="true"/>
+        <Key android:keyLabel="…" android:keyWidth="10%p"  android:isModifier="true"/>
         <Key android:codes="10" android:keyIcon="@drawable/sym_keyboard_return"
                 android:keyWidth="25%p" android:keyEdgeFlags="right"
                 android:iconPreview="@drawable/sym_keyboard_feedback_return"
-                />
+                android:isModifier="true"/>
     </Row>
 </Keyboard>
diff --git a/java/src/com/android/inputmethod/latin/LatinKeyboard.java b/java/src/com/android/inputmethod/latin/LatinKeyboard.java
index 15e22f3..33519e4 100644
--- a/java/src/com/android/inputmethod/latin/LatinKeyboard.java
+++ b/java/src/com/android/inputmethod/latin/LatinKeyboard.java
@@ -628,9 +628,20 @@
     }
 
     class LatinKey extends Keyboard.Key {
-        
+
+        // functional normal state (with properties)
+        private final int[] KEY_STATE_FUNCTIONAL_NORMAL = {
+                android.R.attr.state_single
+        };
+
+        // functional pressed state (with properties)
+        private final int[] KEY_STATE_FUNCTIONAL_PRESSED = {
+                android.R.attr.state_single,
+                android.R.attr.state_pressed
+        };
+
         private boolean mShiftLockEnabled;
-        
+
         public LatinKey(Resources res, Keyboard.Row parent, int x, int y, 
                 XmlResourceParser parser) {
             super(res, parent, x, y, parser);
@@ -639,11 +650,17 @@
                 popupResId = 0;
             }
         }
-        
-        void enableShiftLock() {
+
+        private void enableShiftLock() {
             mShiftLockEnabled = true;
         }
 
+        // sticky is used for shift key.  If a key is not sticky and is modifier,
+        // the key will be treated as functional.
+        private boolean isFunctionalKey() {
+            return !sticky && modifier;
+        }
+
         @Override
         public void onReleased(boolean inside) {
             if (!mShiftLockEnabled) {
@@ -665,6 +682,18 @@
         boolean isInsideSuper(int x, int y) {
             return super.isInside(x, y);
         }
+
+        @Override
+        public int[] getCurrentDrawableState() {
+            if (isFunctionalKey()) {
+                if (pressed) {
+                    return KEY_STATE_FUNCTIONAL_PRESSED;
+                } else {
+                    return KEY_STATE_FUNCTIONAL_NORMAL;
+                }
+            }
+            return super.getCurrentDrawableState();
+        }
     }
 
     /**