diff --git a/src/components/SettingsBar.js b/src/components/SettingsBar.js
index 6494257..ceb29d1 100644
--- a/src/components/SettingsBar.js
+++ b/src/components/SettingsBar.js
@@ -3,70 +3,126 @@ import preact from 'preact'
 
 import Icon from './Icon'
 import storageHelper from '../utils/storageHelper'
+import keyHelper from '../utils/keyHelper'
 
 const ACCESS_TOKEN_REGEXP = /^[0-9a-f]{40}$/
 
+const OperatingSystems = {
+  Windows: 'Windows',
+  macOS: 'Macintosh',
+  others: 'unknown',
+}
+
+function detectOS() {
+  const {
+    navigator: { userAgent },
+  } = window
+  if (userAgent.indexOf(OperatingSystems.Windows) !== -1) return OperatingSystems.Windows
+  else if (userAgent.indexOf(OperatingSystems.macOS) !== -1) return OperatingSystems.macOS
+  return OperatingSystems.others
+}
+
+function friendlyFormatShortcut(shortcut) {
+  const OS = detectOS()
+  if (OS === OperatingSystems.Windows) {
+    return shortcut.replace(/meta/, 'win')
+  } else if (OS === OperatingSystems.macOS) {
+    return shortcut
+      .replace(/meta/, '⌘')
+      .replace(/ctrl/, '⌃')
+      .replace(/shift/, '⇧')
+      .replace(/alt/, '⌥')
+  } else {
+    return shortcut
+  }
+}
+
 export default class SettingsBar extends preact.Component {
   state = {
-    hint: null,
-    hasAccessToken: false,
+    accessTokenHint: null,
     accessToken: '',
+    shortcutHint: null,
+    toggleShowSideBarShortcut: '',
   }
 
   componentWillMount() {
-    const { hasAccessToken } = this.props
-    this.setState({ hasAccessToken })
+    const { toggleShowSideBarShortcut } = this.props
+    this.setState({ toggleShowSideBarShortcut })
   }
-  
-  componentWillReceiveProps({ hasAccessToken }) {
-    this.setState({ hasAccessToken })
+
+  componentWillReceiveProps({ toggleShowSideBarShortcut }) {
+    this.setState({ toggleShowSideBarShortcut })
   }
 
   onInputAccessToken = event => {
     const value = event.target.value
     this.setState({ accessToken: value })
     this.setState({
-      hint: ACCESS_TOKEN_REGEXP.test(value)
-        ? ''
-        : 'This token is in unknown format.'
+      accessTokenHint: ACCESS_TOKEN_REGEXP.test(value) ? '' : 'This token is in unknown format.',
     })
   }
 
-  saveToken = () => {
+  saveToken = async () => {
+    const { onHasAccessTokenChange } = this.props
     const { accessToken } = this.state
     if (accessToken) {
-      storageHelper.setAccessToken(accessToken)
+      await storageHelper.setAccessToken(accessToken)
+      onHasAccessTokenChange(true)
       this.setState({
-        hasAccessToken: true,
-        hint: 'Your token is saved, will work after reloading the page!',
+        accessTokenHint: 'Your token is saved, will work after reloading the page!',
       })
     }
   }
 
-  clearToken = () => {
-    storageHelper.setAccessToken('')
-    this.setState({ accessToken: '', hasAccessToken: false })
+  clearToken = async () => {
+    const { onHasAccessTokenChange } = this.props
+    await storageHelper.setAccessToken('')
+    onHasAccessTokenChange(false)
+    this.setState({ accessToken: '' })
+  }
+
+  saveShortcut = async () => {
+    const { onShortcutChange } = this.props
+    const { toggleShowSideBarShortcut } = this.state
+    await storageHelper.setShortcut(toggleShowSideBarShortcut)
+    onShortcutChange(toggleShowSideBarShortcut)
+    this.setState({
+      shortcutHint: 'Shortcut is saved!',
+    })
+  }
+
+  /**
+   * @param {KeyboardEvent} e
+   */
+  onShortCutInputKeyDown = e => {
+    e.preventDefault()
+    const shortcut = keyHelper.parseEvent(e)
+    this.setState({ toggleShowSideBarShortcut: shortcut })
   }
 
   render() {
-    const { hint, accessToken, hasAccessToken } = this.state
-    const { toggleShowSettings, activated} = this.props
+    const { accessTokenHint, accessToken, toggleShowSideBarShortcut, shortcutHint } = this.state
+    const { hasAccessToken } = this.props
+    const { toggleShowSettings, activated } = this.props
     return (
       <div className={'gitako-settings-bar'}>
         <div className={'placeholder-row'}>
           <h3>{activated ? 'Settings' : ''}</h3>
-          {activated
-            ? <Icon type={'chevron-down'} className={'hide-settings-icon'} onClick={toggleShowSettings} />
-            : <Icon type={'gear'} className={'show-settings-icon'} onClick={toggleShowSettings} />
-          }
+          {activated ? (
+            <Icon
+              type={'chevron-down'}
+              className={'hide-settings-icon'}
+              onClick={toggleShowSettings}
+            />
+          ) : (
+            <Icon type={'gear'} className={'show-settings-icon'} onClick={toggleShowSettings} />
+          )}
         </div>
         {activated && (
           <div className={'gitako-settings-bar-content'}>
             <div className={'gitako-settings-bar-content-section access-token'}>
               <h4>Access Token</h4>
-              <span>
-                With access token provided, Gitako can access more repositories.
-              </span>
+              <span>With access token provided, Gitako can access more repositories.</span>
               <br />
               <a href="https://github.com/blog/1509-personal-api-tokens" target="_blank">
                 Help: how to create access token?
@@ -84,21 +140,39 @@ export default class SettingsBar extends preact.Component {
                 <input
                   className={'access-token-input form-control'}
                   disabled={hasAccessToken}
-                  placeholder={
-                    hasAccessToken
-                      ? 'Your token is saved'
-                      : 'Input your token here'
-                  }
+                  placeholder={hasAccessToken ? 'Your token is saved' : 'Input your token here'}
                   value={accessToken}
                   onInput={this.onInputAccessToken}
                 />
-                {
-                  hasAccessToken
-                    ? <button className={'btn'} onClick={this.clearToken}>Clear</button>
-                    : <button className={'btn'} onClick={this.saveToken}>Save</button>
-                }
+                {hasAccessToken ? (
+                  <button className={'btn'} onClick={this.clearToken}>
+                    Clear
+                  </button>
+                ) : (
+                  <button className={'btn'} onClick={this.saveToken}>
+                    Save
+                  </button>
+                )}
               </div>
-              {hint && <span className={'hint'}>{hint}</span>}
+              {accessTokenHint && <span className={'hint'}>{accessTokenHint}</span>}
+            </div>
+            <div className={'gitako-settings-bar-content-section toggle-shortcut'}>
+              <h4>Toggle shortcut</h4>
+              <span>Set a combination of keys for toggling Gitako sidebar.</span>
+              <br />
+              <div className={'toggle-shortcut-input-control'}>
+                <input
+                  className={'toggle-shortcut-input form-control'}
+                  placeholder={'focus here and press the shortcut keys'}
+                  default={''}
+                  value={friendlyFormatShortcut(toggleShowSideBarShortcut)}
+                  onKeyDown={this.onShortCutInputKeyDown}
+                />
+                <button className={'btn'} onClick={this.saveShortcut}>
+                  Save
+                </button>
+              </div>
+              {shortcutHint && <span className={'hint'}>{shortcutHint}</span>}
             </div>
             <div className={'gitako-settings-bar-content-section position'}>
               <h5>Position of Gitako (WIP)</h5>
diff --git a/src/components/SideBar.js b/src/components/SideBar.js
index 236cefb..b1de9cc 100644
--- a/src/components/SideBar.js
+++ b/src/components/SideBar.js
@@ -13,6 +13,7 @@ import DOMHelper, { REPO_TYPE_PRIVATE } from '../utils/DOMHelper'
 import GitHubHelper, { NOT_FOUND, BAD_CREDENTIALS } from '../utils/GitHubHelper'
 import storageHelper from '../utils/storageHelper'
 import URLHelper from '../utils/URLHelper'
+import keyHelper from '../utils/keyHelper'
 
 export default class SideBar extends preact.Component {
   state = {
@@ -23,7 +24,9 @@ export default class SideBar extends preact.Component {
     // whether failed loading the repo due to it is private
     errorDueToAuth: false,
     // got access token for GitHub
-    hasAccessToken: null,
+    hasAccessToken: false,
+    // the shortcut string for toggle sidebar
+    toggleShowSideBarShortcut: '',
     // meta data for the repository
     metaData: null,
     // file tree data
@@ -35,8 +38,11 @@ export default class SideBar extends preact.Component {
       const metaDataFromUrl = URLHelper.parse()
       this.setState({ metaData: metaDataFromUrl })
       DOMHelper.decorateGitHubPageContent()
-      const accessToken = await storageHelper.getAccessToken()
-      this.setState({ hasAccessToken: Boolean(accessToken) })
+      const [accessToken, shortcut] = await Promise.all([
+        storageHelper.getAccessToken(),
+        storageHelper.getShortcut(),
+      ])
+      this.setState({ hasAccessToken: Boolean(accessToken), toggleShowSideBarShortcut: shortcut })
       const metaDataFromAPI = await GitHubHelper.getRepoMeta({ ...metaDataFromUrl, accessToken })
       const branchName = metaDataFromUrl.branchName || metaDataFromAPI['default_branch']
       const metaData = { ...metaDataFromUrl, branchName, api: metaDataFromAPI }
@@ -48,6 +54,7 @@ export default class SideBar extends preact.Component {
 
       window.addEventListener('pjax:send', this.onPJAXStart)
       window.addEventListener('pjax:complete', this.onPJAXEnd)
+      window.addEventListener('keydown', this.onKeyDown)
     } catch (err) {
       // TODO: detect request time exceeds limit
       if (err.message === NOT_FOUND || err.message === BAD_CREDENTIALS) {
@@ -99,6 +106,24 @@ export default class SideBar extends preact.Component {
     this.setState({ showSettings: !showSettings })
   }
 
+  onHasAccessTokenChange = hasAccessToken => {
+    this.setState({ hasAccessToken })
+  }
+
+  onKeyDown = e => {
+    const { toggleShowSideBarShortcut } = this.state
+    if (toggleShowSideBarShortcut) {
+      const keys = keyHelper.parseEvent(e)
+      if (keys === toggleShowSideBarShortcut) {
+        this.toggleShowSideBar()
+      }
+    }
+  }
+
+  onShortcutChange = shortcut => {
+    this.setState({ toggleShowSideBarShortcut: shortcut })
+  }
+
   renderAccessDeniedError() {
     return (
       <div className={'description'}>
@@ -126,7 +151,13 @@ export default class SideBar extends preact.Component {
   }
 
   render() {
-    const { shouldShow, showSettings, hasAccessToken, loading } = this.state
+    const {
+      shouldShow,
+      showSettings,
+      hasAccessToken,
+      toggleShowSideBarShortcut,
+      loading,
+    } = this.state
     return (
       <div className={cx('gitako', { hidden: !shouldShow })}>
         <Portal into={this.logoContainerElement}>
@@ -136,8 +167,11 @@ export default class SideBar extends preact.Component {
           {this.renderContent()}
           <SettingsBar
             toggleShowSettings={this.toggleShowSettings}
+            onShortcutChange={this.onShortcutChange}
+            onHasAccessTokenChange={this.onHasAccessTokenChange}
             activated={showSettings}
             hasAccessToken={hasAccessToken}
+            toggleShowSideBarShortcut={toggleShowSideBarShortcut}
           />
         </div>
       </div>
diff --git a/src/content.less b/src/content.less
index 2524d52..7d5a4a2 100644
--- a/src/content.less
+++ b/src/content.less
@@ -274,6 +274,19 @@
           }
         }
       }
+      .toggle-shortcut {
+        .hint {
+          color: #6a737d;
+        }
+      }
+      .toggle-shortcut-input-control {
+        display: flex;
+        margin-top: 8px;
+        .toggle-shortcut-input {
+          flex: 1;
+          box-shadow: none;
+        }
+      }
       .placeholder-row {
         display: flex;
         justify-content: space-between;
diff --git a/src/utils/keyHelper.js b/src/utils/keyHelper.js
new file mode 100644
index 0000000..8d26bcb
--- /dev/null
+++ b/src/utils/keyHelper.js
@@ -0,0 +1,58 @@
+const keyCodeArray = [
+  ...'1234567890abcdefghijklmnopqrstuvwxyz'.split(''),
+  ...'`[]\\;\',./'.split(''),
+  'alt',
+  'shift',
+  'control',
+  'meta',
+]
+const validKeyCodes = new Set(keyCodeArray)
+
+function isValidKey(key) {
+  return validKeyCodes.has(key)
+}
+
+/**
+ * parse a string representation of key combination
+ *
+ * @param {string} keysString
+ * @returns {string}
+ */
+function parse(keysString) {
+  return (
+    keysString
+      .split('+')
+      /* when trying to set a combination includes '+',
+    input should be 'shift + =' instead of 'shift + +',
+    thus a valid key string won't contain '++' */
+      .map(_ => _.trim().toLowerCase())
+      .filter(isValidKey)
+      .sort((a, b) => keyCodeArray.indexOf(b) - keyCodeArray.indexOf(a))
+      .join('+')
+  )
+}
+
+function parseKeyCode(code) {
+  let c = code.toLowerCase()
+  c = c.replace(/(left|right)$/, '')
+  c = c.replace(/^digit/, '')
+  c = c.replace(/^key/, '')
+  return c
+}
+
+function parseEvent(e) {
+  const { altKey: alt, shiftKey: shift, metaKey: meta, ctrlKey: ctrl } = e
+  const code = parseKeyCode(e.code)
+  const keys = { meta, ctrl, shift, alt, [code]: true }
+  const combination = parse(
+    Object.entries(keys)
+      .filter(([key, pressed]) => pressed)
+      .map(([key, pressed]) => key)
+      .join('+')
+  )
+  return combination
+}
+
+export default {
+  parseEvent,
+}
diff --git a/src/utils/storageHelper.js b/src/utils/storageHelper.js
index 7f3195d..a5f1f19 100644
--- a/src/utils/storageHelper.js
+++ b/src/utils/storageHelper.js
@@ -1,5 +1,6 @@
 const localStorage = chrome.storage.local
 const ACCESS_TOKEN_KEY = 'access_token'
+const SHORTCUT_KEY = 'shortcut'
 
 function get(key) {
   return new Promise(resolve => localStorage.get(key, items => resolve(items[key])))
@@ -17,9 +18,19 @@ function setAccessToken(accessToken) {
   return set(ACCESS_TOKEN_KEY, accessToken)
 }
 
+function getShortcut() {
+  return get(SHORTCUT_KEY)
+}
+
+function setShortcut(shortcut) {
+  return set(SHORTCUT_KEY, shortcut)
+}
+
 export default {
   get,
   set,
   getAccessToken,
   setAccessToken,
+  getShortcut,
+  setShortcut,
 }