diff --git a/java/res/values/attrs.xml b/java/res/values/attrs.xml
index f0da274..28c948b 100644
--- a/java/res/values/attrs.xml
+++ b/java/res/values/attrs.xml
@@ -107,8 +107,8 @@
             <!-- Key is anchored to the right of the keyboard. -->
             <flag name="right" value="2" />
         </attr>
-        <!-- Whether this is a modifier key such as Alt or Shift. -->
-        <attr name="isModifier" format="boolean" />
+        <!-- Whether this is a functional key which has different key top than normal key. -->
+        <attr name="isFunctional" format="boolean" />
         <!-- Whether this is a toggle key. -->
         <attr name="isSticky" format="boolean" />
         <!-- Whether long-pressing on this key will make it repeat. -->
diff --git a/java/res/xml-xlarge/kbd_key_styles.xml b/java/res/xml-xlarge/kbd_key_styles.xml
index fc06d00..4fefe00 100644
--- a/java/res/xml-xlarge/kbd_key_styles.xml
+++ b/java/res/xml-xlarge/kbd_key_styles.xml
@@ -28,7 +28,7 @@
         >
             <key-style
                 latin:styleName="functionalKeyStyle"
-                latin:isModifier="true" />
+                latin:isFunctional="true" />
             <key-style
                 latin:styleName="shiftKeyStyle"
                 latin:code="@integer/key_shift"
diff --git a/java/res/xml/kbd_key_styles.xml b/java/res/xml/kbd_key_styles.xml
index 473510e..ea5d4cc 100644
--- a/java/res/xml/kbd_key_styles.xml
+++ b/java/res/xml/kbd_key_styles.xml
@@ -28,7 +28,7 @@
         >
             <key-style
                 latin:styleName="functionalKeyStyle"
-                latin:isModifier="true" />
+                latin:isFunctional="true" />
             <key-style
                 latin:styleName="shiftKeyStyle"
                 latin:code="@integer/key_shift"
diff --git a/java/res/xml/kbd_qwerty_black_symbol.xml b/java/res/xml/kbd_qwerty_black_symbol.xml
index 6e45c12..69e7e31 100644
--- a/java/res/xml/kbd_qwerty_black_symbol.xml
+++ b/java/res/xml/kbd_qwerty_black_symbol.xml
@@ -38,7 +38,7 @@
                         latin:keyIcon="@drawable/sym_bkeyboard_123_mic"
                         latin:iconPreview="@drawable/sym_keyboard_feedback_123_mic"
                         latin:keyWidth="20%p"
-                        latin:isModifier="true"
+                        latin:isFunctional="true"
                         latin:keyEdgeFlags="left" />
                 </case>
                 <default>
@@ -46,7 +46,7 @@
                         latin:code="@integer/key_switch_alpha_symbol"
                         latin:keyLabel="@string/label_to_symbol_key"
                         latin:keyWidth="20%p"
-                        latin:isModifier="true"
+                        latin:isFunctional="true"
                         latin:keyEdgeFlags="left" />
                 </default>
             </switch>
@@ -67,7 +67,7 @@
                         latin:keyIcon="@drawable/sym_bkeyboard_123_mic"
                         latin:iconPreview="@drawable/sym_keyboard_feedback_123_mic"
                         latin:keyWidth="15%p"
-                        latin:isModifier="true"
+                        latin:isFunctional="true"
                         latin:keyEdgeFlags="left" />
                 </case>
                 <default>
@@ -75,7 +75,7 @@
                         latin:code="@integer/key_switch_alpha_symbol"
                         latin:keyLabel="@string/label_to_symbol_key"
                         latin:keyWidth="15%p"
-                        latin:isModifier="true"
+                        latin:isFunctional="true"
                         latin:keyEdgeFlags="left" />
                 </default>
             </switch>
diff --git a/java/res/xml/kbd_qwerty_f1.xml b/java/res/xml/kbd_qwerty_f1.xml
index 6bb96c0..008448b 100644
--- a/java/res/xml/kbd_qwerty_f1.xml
+++ b/java/res/xml/kbd_qwerty_f1.xml
@@ -29,7 +29,7 @@
                 latin:keyLabel="/"
                 latin:keyHintIcon="@drawable/hint_popup"
                 latin:popupCharacters="@string/alternates_for_settings_slash"
-                latin:isModifier="true" />
+                latin:isFunctional="true" />
         </case>
         <case
             latin:mode="email"
@@ -38,7 +38,7 @@
                 latin:keyLabel="\@"
                 latin:keyHintIcon="@drawable/hint_popup"
                 latin:popupCharacters="@string/alternates_for_settings_at"
-                latin:isModifier="true" />
+                latin:isFunctional="true" />
         </case>
         <default>
             <switch>
@@ -57,7 +57,7 @@
                         >
                             <Key
                                 latin:keyLabel=","
-                                latin:isModifier="true" />
+                                latin:isFunctional="true" />
                         </case>
                         <case
                             latin:hasSettingsKey="false"
@@ -66,7 +66,7 @@
                                 latin:keyLabel=","
                                 latin:keyHintIcon="@drawable/hint_popup"
                                 latin:popupCharacters="@string/alternates_for_settings_comma"
-                                latin:isModifier="true" />
+                                latin:isFunctional="true" />
                         </case>
                     </switch>
                 </case>
diff --git a/java/src/com/android/inputmethod/keyboard/Key.java b/java/src/com/android/inputmethod/keyboard/Key.java
index 7396f05..f578bd6 100644
--- a/java/src/com/android/inputmethod/keyboard/Key.java
+++ b/java/src/com/android/inputmethod/keyboard/Key.java
@@ -83,8 +83,8 @@
      * {@link Keyboard#EDGE_TOP} and {@link Keyboard#EDGE_BOTTOM}.
      */
     public final int mEdgeFlags;
-    /** Whether this is a modifier key, such as Shift or Alt */
-    public final boolean mModifier;
+    /** Whether this is a functional key which has different key top than normal key */
+    public final boolean mFunctional;
     /** Whether this key repeats itself when held down */
     public final boolean mRepeatable;
 
@@ -93,8 +93,8 @@
 
     /** The current pressed state of this key */
     public boolean mPressed;
-    /** If this is a sticky key, is it on? */
-    public boolean mOn;
+    /** If this is a sticky key, is its highlight on? */
+    public boolean mHighlightOn;
     /** Key is enabled and responds on press */
     public boolean mEnabled = true;
 
@@ -150,7 +150,7 @@
         mManualTemporaryUpperCaseHintIcon = null;
         mManualTemporaryUpperCaseCode = Keyboard.CODE_DUMMY;
         mLabelOption = 0;
-        mModifier = false;
+        mFunctional = false;
         mSticky = false;
         mRepeatable = false;
         mPopupCharacters = null;
@@ -224,7 +224,7 @@
                     mKeyboard.getMaxPopupKeyboardColumn());
 
             mRepeatable = style.getBoolean(keyAttr, R.styleable.Keyboard_Key_isRepeatable, false);
-            mModifier = style.getBoolean(keyAttr, R.styleable.Keyboard_Key_isModifier, false);
+            mFunctional = style.getBoolean(keyAttr, R.styleable.Keyboard_Key_isFunctional, false);
             mSticky = style.getBoolean(keyAttr, R.styleable.Keyboard_Key_isSticky, false);
             mEnabled = style.getBoolean(keyAttr, R.styleable.Keyboard_Key_enabled, true);
             mEdgeFlags = style.getFlag(keyAttr, R.styleable.Keyboard_Key_keyEdgeFlags, 0)
@@ -315,22 +315,19 @@
     /**
      * Informs the key that it has been pressed, in case it needs to change its appearance or
      * state.
-     * @see #onReleased(boolean)
+     * @see #onReleased()
      */
     public void onPressed() {
-        mPressed = !mPressed;
+        mPressed = true;
     }
 
     /**
-     * Changes the pressed state of the key. If it is a sticky key, it will also change the
-     * toggled state of the key if the finger was release inside.
-     * @param inside whether the finger was released inside the key
+     * Informs the key that it has been released, in case it needs to change its appearance or
+     * state.
      * @see #onPressed()
      */
-    public void onReleased(boolean inside) {
-        mPressed = !mPressed;
-        if (mSticky && !mKeyboard.isShiftLockEnabled(this))
-            mOn = !mOn;
+    public void onReleased() {
+        mPressed = false;
     }
 
     public boolean isInside(int x, int y) {
@@ -376,12 +373,6 @@
         return dx * dx + dy * dy;
     }
 
-    // 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 !mSticky && mModifier;
-    }
-
     /**
      * Returns the drawable state for the key, based on the current state and type of the key.
      * @return the drawable state of the key.
@@ -389,7 +380,7 @@
      */
     public int[] getCurrentDrawableState() {
         final boolean pressed = mEnabled && mPressed;
-        if (isFunctionalKey()) {
+        if (!mSticky && mFunctional) {
             if (pressed) {
                 return KEY_STATE_FUNCTIONAL_PRESSED;
             } else {
@@ -399,7 +390,7 @@
 
         int[] states = KEY_STATE_NORMAL;
 
-        if (mOn) {
+        if (mHighlightOn) {
             if (pressed) {
                 states = KEY_STATE_PRESSED_ON;
             } else {
diff --git a/java/src/com/android/inputmethod/keyboard/KeyStyles.java b/java/src/com/android/inputmethod/keyboard/KeyStyles.java
index 169f2e6..d464c20 100644
--- a/java/src/com/android/inputmethod/keyboard/KeyStyles.java
+++ b/java/src/com/android/inputmethod/keyboard/KeyStyles.java
@@ -185,7 +185,7 @@
             readDrawable(keyAttr, R.styleable.Keyboard_Key_iconPreview);
             readDrawable(keyAttr, R.styleable.Keyboard_Key_keyHintIcon);
             readDrawable(keyAttr, R.styleable.Keyboard_Key_shiftedIcon);
-            readBoolean(keyAttr, R.styleable.Keyboard_Key_isModifier);
+            readBoolean(keyAttr, R.styleable.Keyboard_Key_isFunctional);
             readBoolean(keyAttr, R.styleable.Keyboard_Key_isSticky);
             readBoolean(keyAttr, R.styleable.Keyboard_Key_isRepeatable);
             readBoolean(keyAttr, R.styleable.Keyboard_Key_enabled);
diff --git a/java/src/com/android/inputmethod/keyboard/Keyboard.java b/java/src/com/android/inputmethod/keyboard/Keyboard.java
index 06d4468..4181882 100644
--- a/java/src/com/android/inputmethod/keyboard/Keyboard.java
+++ b/java/src/com/android/inputmethod/keyboard/Keyboard.java
@@ -293,7 +293,7 @@
     public boolean setShiftLocked(boolean newShiftLockState) {
         final Map<Key, Drawable> shiftedIcons = getShiftedIcons();
         for (final Key key : getShiftKeys()) {
-            key.mOn = newShiftLockState;
+            key.mHighlightOn = newShiftLockState;
             key.setIcon(newShiftLockState ? shiftedIcons.get(key) : mNormalShiftIcons.get(key));
         }
         mShiftState.setShiftLocked(newShiftLockState);
diff --git a/java/src/com/android/inputmethod/keyboard/KeyboardSwitcher.java b/java/src/com/android/inputmethod/keyboard/KeyboardSwitcher.java
index cfa3c44..dd25b34 100644
--- a/java/src/com/android/inputmethod/keyboard/KeyboardSwitcher.java
+++ b/java/src/com/android/inputmethod/keyboard/KeyboardSwitcher.java
@@ -263,10 +263,10 @@
         int xmlId = mode == KeyboardId.MODE_PHONE ? R.xml.kbd_phone : R.xml.kbd_symbols;
         final String xmlName = res.getResourceEntryName(xmlId);
         mSymbolsId = new KeyboardId(xmlName, xmlId, colorScheme, locale, orientation, mode,
-                attribute, hasSettingsKey, mVoiceKeyEnabled, hasVoiceKey, true);
+                attribute, hasSettingsKey, mVoiceKeyEnabled, hasVoiceKey, false);
         xmlId = mode == KeyboardId.MODE_PHONE ? R.xml.kbd_phone_symbols : R.xml.kbd_symbols_shift;
         mSymbolsShiftedId = new KeyboardId(xmlName, xmlId, colorScheme, locale, orientation, mode,
-                attribute, hasSettingsKey, mVoiceKeyEnabled, hasVoiceKey, true);
+                attribute, hasSettingsKey, mVoiceKeyEnabled, hasVoiceKey, false);
     }
 
     public int getKeyboardMode() {
@@ -565,16 +565,14 @@
             mCurrentId = mSymbolsShiftedId;
             keyboard = getKeyboard(mCurrentId);
             // Symbol shifted keyboard has an ALT key that has a caps lock style indicator. To
-            // enable the indicator, we need to call enableShiftLock() and setShiftLocked(true).
-            // Thus we can keep the ALT key's Key.on value true while LatinKey.onRelease() is
-            // called.
+            // enable the indicator, we need to call setShiftLocked(true).
             keyboard.setShiftLocked(true);
         } else {
             mCurrentId = mSymbolsId;
             keyboard = getKeyboard(mCurrentId);
             // Symbol keyboard has an ALT key that has a caps lock style indicator. To disable the
-            // indicator, we need to call enableShiftLock() and setShiftLocked(false).
-            keyboard.setShifted(false);
+            // indicator, we need to call setShiftLocked(false).
+            keyboard.setShiftLocked(false);
         }
         setKeyboard(keyboard);
     }
diff --git a/java/src/com/android/inputmethod/keyboard/PointerTracker.java b/java/src/com/android/inputmethod/keyboard/PointerTracker.java
index 1c918b9..c281970 100644
--- a/java/src/com/android/inputmethod/keyboard/PointerTracker.java
+++ b/java/src/com/android/inputmethod/keyboard/PointerTracker.java
@@ -258,9 +258,7 @@
         mPreviousKey = keyIndex;
         if (keyIndex != oldKeyIndex) {
             if (isValidKeyIndex(oldKeyIndex)) {
-                // if new key index is not a key, old key was just released inside of the key.
-                final boolean inside = (keyIndex == NOT_A_KEY);
-                mKeys[oldKeyIndex].onReleased(inside);
+                mKeys[oldKeyIndex].onReleased();
                 mProxy.invalidateKey(mKeys[oldKeyIndex]);
             }
             if (isValidKeyIndex(keyIndex)) {