diff --git a/DEVELOPMENT.md b/DEVELOPMENT.md
new file mode 100644
index 00000000..700820d6
--- /dev/null
+++ b/DEVELOPMENT.md
@@ -0,0 +1,56 @@
+## Release
+### Binary
+When you build release packages, please use `electron-builder`.
+
+```bash
+# for linux
+$ npm run build:linux
+
+# for mac
+# This command automatically loads the Developer ID Application certificate from your keychain.
+$ npm run build:mac
+```
+
+### AppStore
+
+Please prepare certificates on your Apple developer console. The following keys are required:
+
+- Mac App Distribution: `3rd Party Mac Developer Application: NAME (TEAM_ID)`
+- Mac Installer Distribution: `3rd Party Mac Developer Installer: NAME (TEAM_ID)`
+
+and register your KeyChain.
+
+Then, create a Mac App ID like `org.whalebird.desktop`.
+
+```bash
+$ npm run build:mas
+
+# This command automatically loads the certificates from you keychain.
+$ ./appStore.sh
+```
+
+After that, the `.pkg` file is created under `./packages`.
+
+Please upload the `.pkg` to App Store using Application Loader in Xcode.
+
+### Snapcraft
+
+First, please prepare snapcraft command.
+
+```bash
+$ brew install snapcraft
+```
+
+And prepare docker environment which is used in snapcraft building.
+
+Build app for linux.
+
+```bash
+$ npm run build:linux
+```
+
+And upload.
+
+```bash
+$ snapcraft push build/whalebird_1.0.0_amd64.snap --release stable
+```
diff --git a/README.md b/README.md
index 25e437db..ec7ef67b 100644
--- a/README.md
+++ b/README.md
@@ -34,6 +34,7 @@ Whalebird is a mastodon client for desktop application.
 <tr><td> Favourite the toot              </td><td>             <kbd>f</kbd>                   </td><td> <kbd>f</kbd>          </td></tr>
 <tr><td> Open details of the toot        </td><td>             <kbd>o</kbd>                   </td><td> <kbd>o</kbd>          </td></tr>
 <tr><td> Open account profile of the toot</td><td>             <kbd>p</kbd>                   </td><td> <kbd>p</kbd>          </td></tr>
+<tr><td> Close current page              </td><td>             <kbd>esc</kbd>                 </td><td> <kbd>esc</kbd>          </td></tr>
 </tbody>
 </table>
 
@@ -99,62 +100,13 @@ $ npm run dev
 
 If there is something unknown, please refer this pull request: https://github.com/h3poteto/whalebird-desktop/pull/502
 
-## Release
-### Binary
-When you build release packages, please use `electron-builder`.
-
-```bash
-# for linux
-$ npm run build:linux
-
-# for mac
-# This command automatically loads the Developer ID Application certificate from your keychain.
-$ npm run build:mac
-```
-
-### AppStore
-
-Please prepare certificates on your Apple developer console. The following keys are required:
-
-- Mac App Distribution: `3rd Party Mac Developer Application: NAME (TEAM_ID)`
-- Mac Installer Distribution: `3rd Party Mac Developer Installer: NAME (TEAM_ID)`
-
-and register your KeyChain.
-
-Then, create a Mac App ID like `org.whalebird.desktop`.
-
-```bash
-$ npm run build:mas
-
-# This command automatically loads the certificates from you keychain.
-$ ./appStore.sh
-```
-
-After that, the `.pkg` file is created under `./packages`.
-
-Please upload the `.pkg` to App Store using Application Loader in Xcode.
-
-### Snapcraft
-
-First, please prepare snapcraft command.
-
-```bash
-$ brew install snapcraft
-```
-
-And prepare docker environment which is used in snapcraft building.
-
-Build app for linux.
-
-```bash
-$ npm run build:linux
-```
-
-And upload.
-
-```bash
-$ snapcraft push build/whalebird_1.0.0_amd64.snap --release stable
-```
 
 # License
 The software is available as open source under the terms of the [MIT License](https://opensource.org/licenses/MIT).
+
+# Donate
+I prepared Bitcoin Address.
+
+![Bitcoin](qr.png)
+
+`1EqB53JSWCQDG3NpKpvUyQPJs54e7MxE6z`
diff --git a/qr.png b/qr.png
new file mode 100644
index 00000000..7014eba3
Binary files /dev/null and b/qr.png differ