diff --git a/app/src/main/res/layout-land/activity_about.xml b/app/src/main/res/layout-land/activity_about.xml
index c7ac404..b36a20c 100644
--- a/app/src/main/res/layout-land/activity_about.xml
+++ b/app/src/main/res/layout-land/activity_about.xml
@@ -87,6 +87,13 @@
             android:layout_gravity="center_horizontal"
             android:text="@string/about_author_names"/>
 
+        <TextView
+            android:id="@+id/co_authorname"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center_horizontal"
+            android:text="@string/about_co_author_names"/>
+
         <TextView
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
diff --git a/app/src/main/res/layout-xlarge-land/activity_about.xml b/app/src/main/res/layout-xlarge-land/activity_about.xml
index 5580f18..051389c 100644
--- a/app/src/main/res/layout-xlarge-land/activity_about.xml
+++ b/app/src/main/res/layout-xlarge-land/activity_about.xml
@@ -87,6 +87,13 @@
             android:layout_gravity="center_horizontal"
             android:text="@string/about_author_names"/>
 
+        <TextView
+            android:id="@+id/co_authorname"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center_horizontal"
+            android:text="@string/about_co_author_names"/>
+
         <TextView
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
diff --git a/app/src/main/res/layout-xlarge/activity_about.xml b/app/src/main/res/layout-xlarge/activity_about.xml
index 3f69cbc..c15dd32 100644
--- a/app/src/main/res/layout-xlarge/activity_about.xml
+++ b/app/src/main/res/layout-xlarge/activity_about.xml
@@ -88,6 +88,13 @@
             android:layout_gravity="center_horizontal"
             android:text="@string/about_author_names"/>
 
+        <TextView
+            android:id="@+id/co_authorname"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center_horizontal"
+            android:text="@string/about_co_author_names"/>
+
         <TextView
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"