diff --git a/java/res/values/strings.xml b/java/res/values/strings.xml
index d51d378..d663b00 100644
--- a/java/res/values/strings.xml
+++ b/java/res/values/strings.xml
@@ -26,6 +26,8 @@
     <string name="english_ime_settings">Android keyboard settings</string>
     <!-- Title for Latin keyboard input options dialog [CHAR LIMIT=25] -->
     <string name="english_ime_input_options">Input options</string>
+    <!-- Title for Latin keyboard research log dialog, which contains special commands for users that contribute data for research. [CHAR LIMIT=25] -->
+    <string name="english_ime_research_log">Research Log Commands</string>
 
     <!-- Name of Android spell checker service -->
     <string name="spell_checker_service_name">Android spell checker</string>
@@ -233,6 +235,20 @@
     <!-- Title for input language selection screen -->
     <string name="language_selection_title">Input languages</string>
 
+    <!-- Title for dialog option that lets user mark a particular time in the log for later review by experts [CHAR LIMIT=25] -->
+    <string name="note_timestamp_for_researchlog">Note timestamp in log</string>
+    <!-- Toast notification message that the time has been marked for later review. [CHAR LIMIT=25] -->
+    <string name="notify_recorded_timestamp">Recorded timestamp</string>
+
+    <!-- Title for dialog option to let users cancel logging and delete log for this session [CHAR LIMIT=25] -->
+    <string name="do_not_log_this_session">Do not log this session</string>
+    <!-- Toast notification that the system is processing the request to delete the log for this session [CHAR LIMIT=25] -->
+    <string name="notify_session_log_deleting">Deleting session log</string>
+    <!-- Toast notification that the system has successfully deleted the log for this session [CHAR LIMIT=25] -->
+    <string name="notify_session_log_deleted">Session log deleted</string>
+    <!-- Toast notification that the system has failed to delete the log for this session [CHAR LIMIT=25] -->
+    <string name="notify_session_log_not_deleted">Session log NOT deleted</string>
+
     <!-- Preference for input language selection -->
     <string name="select_language">Input languages</string>
 
diff --git a/java/res/xml/key_styles_common.xml b/java/res/xml/key_styles_common.xml
index 819cdc6..7db1d29 100644
--- a/java/res/xml/key_styles_common.xml
+++ b/java/res/xml/key_styles_common.xml
@@ -22,23 +22,8 @@
     xmlns:latin="http://schemas.android.com/apk/res/com.android.inputmethod.latin"
 >
     <!-- Base key style for the key which may have settings or tab key as popup key. -->
-    <switch>
-        <case
-            latin:clobberSettingsKey="true"
-        >
-            <key-style
-                latin:styleName="f1MoreKeysStyle"
-                latin:backgroundType="functional" />
-        </case>
-        <!-- clobberSettingsKey="false" -->
-        <default>
-            <key-style
-                latin:styleName="f1MoreKeysStyle"
-                latin:keyLabelFlags="hasPopupHint"
-                latin:moreKeys="!text/settings_as_more_key"
-                latin:backgroundType="functional" />
-        </default>
-    </switch>
+    <include
+        latin:keyboardLayout="@xml/key_styles_f1" />
     <!-- Functional key styles -->
     <switch>
         <case
diff --git a/java/res/xml/key_styles_f1.xml b/java/res/xml/key_styles_f1.xml
new file mode 100644
index 0000000..8dfc3cb
--- /dev/null
+++ b/java/res/xml/key_styles_f1.xml
@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/*
+**
+** Copyright 2012, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+**     http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+-->
+
+<merge
+    xmlns:latin="http://schemas.android.com/apk/res/com.android.inputmethod.latin"
+>
+    <!-- Base key style for the key which may have settings or tab key as popup key. -->
+    <!-- Kept as a separate file for cleaner overriding by an overlay.  -->
+    <switch>
+        <case
+            latin:clobberSettingsKey="true"
+        >
+            <key-style
+                latin:styleName="f1MoreKeysStyle"
+                latin:backgroundType="functional" />
+        </case>
+        <!-- clobberSettingsKey="false" -->
+        <default>
+            <key-style
+                latin:styleName="f1MoreKeysStyle"
+                latin:keyLabelFlags="hasPopupHint"
+                latin:moreKeys="!text/settings_as_more_key"
+                latin:backgroundType="functional" />
+        </default>
+    </switch>
+</merge>