diff --git a/docs/img/layout/Materails_API.png b/docs/img/layout/Materails_API.png
new file mode 100644
index 0000000..be98c0f
Binary files /dev/null and b/docs/img/layout/Materails_API.png differ
diff --git a/docs/source/usage/explorer.rst b/docs/source/usage/explorer.rst
index 138eb06..aa87e23 100644
--- a/docs/source/usage/explorer.rst
+++ b/docs/source/usage/explorer.rst
@@ -10,16 +10,23 @@ By selecting the left menu of home tab, users can control the files.
    :scale: 40 %
    :align: center
 |
-.. csv-table:: Left menu of home tab
-    :header: "No.", "Name", "explanation"
-    :widths: 10, 10, 35
+.. csv-table:: Item of left sidebar
+    :header: "Item", "Explanation"
+    :widths: 25, 35
 
-    "1", "Recently Used", "lately user used or accessed projects list."
-    "2", "My Computer", "the folder list of root directory."
-    "3", "Calculating", "the state of calculation "
-    "4", "Searched", "the previous searching list"
-    "5", "Web", "the bookmarked website list"
-    "6", "Downloads", "Downloaded list"
+    "Recently Used", "The history which users used, is shown in center window."
+    "My Computer", "In the case of windows system, C drive (system drive) is shown in center window.In the case of Mac OS, users home directory is shown."
+    "My Projects", "The QE project which users saved, and Examples are shown in the center window."
+    "Calculating", "Calculating content shows the state of QE calculating."
+    "Web", "Bookmark list is saved. Google URL is set in the Web item from the begining."
+    "Downloads", "The files which users downloaded, are shown."
+
+| 
+Moreover, the items of center window is depicted by 4 types (List, Small Tiles, Medium Tiles and Large Tiles).
+
+.. image:: ../../img/layout/ShowingMethod.gif
+   :scale: 50 %
+   :align: center   
 
 |
 Right click the mouse on the file explore, users can make directory.
diff --git a/docs/source/usage/layout.rst b/docs/source/usage/layout.rst
index d743fa4..9d4060c 100644
--- a/docs/source/usage/layout.rst
+++ b/docs/source/usage/layout.rst
@@ -1,72 +1,58 @@
 Layout of Window
 ================
 
-This page explains the layout of BURAI platform, and summarizes its overview of each part
-(top bar, main home tub, and left sidebar of home tab).
+This page shows the initial window of BURAI as
 
-Top bar
--------
+Header bar
+----------
 
-Top bar was built of two items.
+Header bar has two items:
 
-1. Trigger type menu.
+1. Main menu.
 2. Materials API
 
-* Trigger type menu
+* Main menu
 
-Trigger type menu has eight items. Also > icon can open Trigger type menu.
+Main menu, which is symbolized ">" icon, has eight items.
 
 .. image:: ../../img/layout/TriggerMenu.gif
    :scale: 50 %
-   :align: center
+   :align: left
 
-.. csv-table:: Item of Trigger type menu
-    :header: "Item", "explanation"
-    :widths: 25, 35
+| 
+.. csv-table:: Items of main menu
+    :header: "Item", "Explanation"
+    :widths: 15, 35
 
-    "About BURAI", "BURAI information, version, and license are shown."
-    "Documents", "BURAI manual is shown"
-    "Links (Web)", "Quantum ESPRESSO (QE) Home page and each QE solver page links are inclued."
-    "Path of QE", "Setting and Showing QE and MPI Path."
-    "Proxy server", "Setting proxy system."
+    "About BURAI", "BURAI information, where version and license are shown."
+    "Documents", "This documantation is shown."
+    "Links (Web)", "Some links (QE web page, psudopotential page ...)"
+    "Path of QE", "Set and Show QE and MPI paths."
+    "Proxy server", "Set proxy system."
     "Full screen", "BURAI windows size are changed full screen."
-    "Quit [Ctr +Q]", "BURAI platform are finished."
+    "Quit [Ctr + Q]", "Quit the system of BURAI."
 
 
 * Materials API
 
-BURAI can get crystal structure by using `Materials API <https://materialsproject.org/>`_ .
-Therefore, users have to enter element symbols into the bar of Materials API.
-The detailed explanation is shown in Materials API content (add link).
+You can get crystal structure through `Materials API <https://materialsproject.org/>`_.
+| Please see `here <materialsAPI.html>`_ for the details.
+
+.. image:: ../../img/layout/Material_API.png
+   :scale: 50 %
+   :align: left
 
 Home tab
 --------
 
-Home tab is built from the left sidebar and center window.
-Its left sidebar has seven items. In case users select item of left sidebar,
-its item information is shown in center window. Thus, when user start BURAI platform,
-the history of Recently Used content is shown in its center window.
+Home tab, which is located under header bar, has explorer system.
+| Please see `here <explorer.html>`_ for the details of the explorer.
 
 .. image:: ../../img/layout/HomeTab.png
    :scale: 50 %
-   :align: center
-
-.. csv-table:: Item of left sidebar
-    :header: "Item", "explanation"
-    :widths: 25, 35
-
-    "Recently Used", "The history which users used, is shown in center window."
-    "My Computer", "In the case of windows system, C drive (system drive) is shown in center window.In the case of Mac OS, users home directory is shown."
-    "My Projects", "The QE project which users saved, and Examples are shown in the center window."
-    "Calculating", "Calculating content shows the state of QE calculating."
-    "Web", "Bookmark list is saved. Google URL is set in the Web item from the begining."
-    "Downloads", "The files which users downloaded, are shown."
-
-Moreover, the items of center window is depicted by 4 types (List, Small Tiles, Medium Tiles and Large Tiles).
-
-.. image:: ../../img/layout/ShowingMethod.gif
-   :scale: 50 %
-   :align: center
+   :align: left
+
+