diff --git a/java/res/values/attrs.xml b/java/res/values/attrs.xml
index 28ea6fc..ee4ec05 100644
--- a/java/res/values/attrs.xml
+++ b/java/res/values/attrs.xml
@@ -126,6 +126,8 @@
         <attr name="manualTemporaryUpperCaseHintIcon" format="reference" />
         <!-- The key style to specify a set of key attributes defined by <key_style/> -->
         <attr name="keyStyle" format="string" />
+        <!-- Shift key icon for shifted state -->
+        <attr name="shiftedIcon" format="reference" />
     </declare-styleable>
 
     <declare-styleable name="BaseKeyboard_Row">
diff --git a/java/res/values/dimens.xml b/java/res/values/dimens.xml
index 0073835..f29bc4d 100644
--- a/java/res/values/dimens.xml
+++ b/java/res/values/dimens.xml
@@ -37,6 +37,8 @@
     <dimen name="key_text_size">0.13in</dimen>
     <dimen name="key_label_text_size">0.083in</dimen>
     <dimen name="key_preview_text_size_large">40sp</dimen>
+    <!-- left or right padding for of label alignment -->
+    <dimen name="key_label_horizontal_alignment_padding">0.13in</dimen>
     <dimen name="key_preview_offset">0.000in</dimen>
     <!-- We use "inch", not "dip" because this value tries dealing with physical distance related
          to user's finger. -->