diff --git a/src/main/res/drawable-hdpi/water.png b/src/main/res/drawable-hdpi/water.png
index 40f27a7..b50767f 100644
Binary files a/src/main/res/drawable-hdpi/water.png and b/src/main/res/drawable-hdpi/water.png differ
diff --git a/src/main/res/values-zh-rCN/strings.xml b/src/main/res/values-zh-rCN/strings.xml
index 50a6c69..4a86b64 100644
--- a/src/main/res/values-zh-rCN/strings.xml
+++ b/src/main/res/values-zh-rCN/strings.xml
@@ -42,6 +42,11 @@
     <string name="menu_sync_cancel">取消同步</string>
     <string name="menu_setting">设置</string>
     <string name="menu_search">搜索</string>
+
+    <string name="menu_sky">背景：天空</string>
+    <string name="menu_water">背景：海洋</string>
+    <string name="menu_grassland">背景：草地</string>
+
     <string name="menu_delete">删除</string>
     <string name="menu_move">移动到文件夹</string>
     <string name="menu_select_title">选中了 %d 项</string>
diff --git a/src/main/res/values-zh-rTW/strings.xml b/src/main/res/values-zh-rTW/strings.xml
index 65d3d53..8905157 100644
--- a/src/main/res/values-zh-rTW/strings.xml
+++ b/src/main/res/values-zh-rTW/strings.xml
@@ -43,6 +43,11 @@
     <string name="menu_sync_cancel">取消同步</string>
     <string name="menu_setting">設置</string>
     <string name="menu_search">搜尋</string>
+
+    <string name="menu_sky">背景：天空</string>
+    <string name="menu_water">背景：海洋</string>
+    <string name="menu_grassland">背景：草地</string>
+
     <string name="menu_delete">刪除</string>
     <string name="menu_move">移動到文件夾</string>
     <string name="menu_select_title">選中了 %d 項</string>
diff --git a/src/main/res/values/strings.xml b/src/main/res/values/strings.xml
index a9760d1..d1cb103 100644
--- a/src/main/res/values/strings.xml
+++ b/src/main/res/values/strings.xml
@@ -134,10 +134,10 @@
     <string name="search">Notes</string>
     <string name="datetime_dialog_ok">set</string>
     <string name="datetime_dialog_cancel">cancel</string>
-    <string name="background_sky" />
+    <!--<string name="background_sky" />
     <string name="background_water" />
     <string name="background_grassland" />
-
+    -->
     <plurals name="search_results_title">
          <item quantity="one"><xliff:g id="number" example="1">%1$s</xliff:g> result for \"<xliff:g id="search" example="???">%2$s</xliff:g>\"</item>
         <!-- Case of 0 or 2 or more results. -->