diff --git a/app/src/main/java/io/neoterm/component/font/FontComponent.kt b/app/src/main/java/io/neoterm/component/font/FontComponent.kt
index ac12117..9043dfa 100644
--- a/app/src/main/java/io/neoterm/component/font/FontComponent.kt
+++ b/app/src/main/java/io/neoterm/component/font/FontComponent.kt
@@ -8,6 +8,7 @@ import io.neoterm.R
 import io.neoterm.frontend.preference.NeoPreference
 import io.neoterm.frontend.preference.NeoTermPath
 import io.neoterm.frontend.component.NeoComponent
+import io.neoterm.frontend.preference.DefaultPreference
 import io.neoterm.frontend.terminal.TerminalView
 import io.neoterm.frontend.terminal.eks.ExtraKeysView
 import io.neoterm.utils.AssetsUtils
@@ -17,8 +18,6 @@ import java.io.File
  * @author kiva
  */
 class FontComponent : NeoComponent {
-    private val DEFAULT_FONT_NAME = "SourceCodePro"
-
     private lateinit var DEFAULT_FONT: NeoFont
     private lateinit var fonts: MutableMap<String, NeoFont>
 
@@ -35,10 +34,11 @@ class FontComponent : NeoComponent {
     }
 
     fun getCurrentFontName(): String {
-        var currentFontName = NeoPreference.loadString(R.string.key_customization_font, DEFAULT_FONT_NAME)
+        val defaultFont = DefaultPreference.defaultFont
+        var currentFontName = NeoPreference.loadString(R.string.key_customization_font, defaultFont)
         if (!fonts.containsKey(currentFontName)) {
-            currentFontName = DEFAULT_FONT_NAME
-            NeoPreference.store(R.string.key_customization_font, DEFAULT_FONT_NAME)
+            currentFontName = defaultFont
+            NeoPreference.store(R.string.key_customization_font, defaultFont)
         }
         return currentFontName
     }
@@ -64,8 +64,10 @@ class FontComponent : NeoComponent {
             val font = NeoFont(file)
             fonts.put(fontName, font)
         }
-        if (fonts.containsKey(DEFAULT_FONT_NAME)) {
-            DEFAULT_FONT = fonts[DEFAULT_FONT_NAME]!!
+
+        val defaultFont = DefaultPreference.defaultFont
+        if (fonts.containsKey(defaultFont)) {
+            DEFAULT_FONT = fonts[defaultFont]!!
             return true
         }
         return false
@@ -83,7 +85,8 @@ class FontComponent : NeoComponent {
     }
 
     private fun loadDefaultFontFromAsset(context: Context): NeoFont {
-        return NeoFont(Typeface.createFromAsset(context.assets, "fonts/$DEFAULT_FONT_NAME.ttf"))
+        val defaultFont = DefaultPreference.defaultFont
+        return NeoFont(Typeface.createFromAsset(context.assets, "fonts/$defaultFont.ttf"))
     }
 
     private fun extractDefaultFont(context: Context): Boolean {
@@ -108,18 +111,20 @@ class FontComponent : NeoComponent {
         fonts = mutableMapOf()
 
         val context = App.get()
-        val defaultFontFile = fontFile(DEFAULT_FONT_NAME)
+        val defaultFont = DefaultPreference.defaultFont
+        val defaultFontFile = fontFile(defaultFont)
+
         if (!defaultFontFile.exists()) {
             if (!extractDefaultFont(context)) {
                 DEFAULT_FONT = loadDefaultFontFromAsset(context)
-                fonts.put(DEFAULT_FONT_NAME, DEFAULT_FONT)
+                fonts.put(defaultFont, DEFAULT_FONT)
                 return
             }
         }
 
         if (!reloadFonts()) {
             DEFAULT_FONT = loadDefaultFontFromAsset(context)
-            fonts.put(DEFAULT_FONT_NAME, DEFAULT_FONT)
+            fonts.put(defaultFont, DEFAULT_FONT)
         }
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/io/neoterm/component/session/SessionComponent.kt b/app/src/main/java/io/neoterm/component/session/SessionComponent.kt
index f30f8b1..580abcf 100644
--- a/app/src/main/java/io/neoterm/component/session/SessionComponent.kt
+++ b/app/src/main/java/io/neoterm/component/session/SessionComponent.kt
@@ -8,6 +8,7 @@ import io.neoterm.NeoXorgSettings
 import io.neoterm.R
 import io.neoterm.frontend.component.NeoComponent
 import io.neoterm.frontend.logging.NLog
+import io.neoterm.frontend.preference.DefaultPreference
 import io.neoterm.frontend.preference.NeoPreference
 import io.neoterm.frontend.preference.NeoTermPath
 import io.neoterm.frontend.session.shell.ShellParameter
@@ -101,7 +102,8 @@ class SessionComponent : NeoComponent {
 
     fun createSession(context: Context, parameter: ShellParameter): ShellTermSession {
         val initCommand = parameter.initialCommand ?:
-                NeoPreference.loadString(R.string.key_general_initial_command, "")
+                NeoPreference.loadString(R.string.key_general_initial_command,
+                        DefaultPreference.initialCommand)
 
         val session = ShellTermSession.Builder()
                 .executablePath(parameter.executablePath)
diff --git a/app/src/main/java/io/neoterm/frontend/preference/DefaultPreference.kt b/app/src/main/java/io/neoterm/frontend/preference/DefaultPreference.kt
index a0ad3d6..6534208 100644
--- a/app/src/main/java/io/neoterm/frontend/preference/DefaultPreference.kt
+++ b/app/src/main/java/io/neoterm/frontend/preference/DefaultPreference.kt
@@ -1,9 +1,13 @@
 package io.neoterm.frontend.preference
 
+import io.neoterm.component.color.DefaultColorScheme
+
 /**
  * @author kiva
  */
 object DefaultPreference {
+    const val fontSize = 30
+
     const val enableBell = false
     const val enableVibrate = false
     const val enableExecveWrapper = true
@@ -13,8 +17,10 @@ object DefaultPreference {
     const val enableSwitchNextTab = false
     const val enableExtraKeys = true
     const val enableExplicitExtraKeysWeight = false
+    const val enableBackButtonBeMappedToEscape = false
     const val enableSpecialVolumeKeys = false
 
-    const val loginShell = "bash"
+    const val loginShell = "sh"
     const val initialCommand = ""
+    const val defaultFont = "SourceCodePro"
 }
diff --git a/app/src/main/java/io/neoterm/frontend/preference/NeoPreference.kt b/app/src/main/java/io/neoterm/frontend/preference/NeoPreference.kt
index c5d33cc..fe1a7f8 100644
--- a/app/src/main/java/io/neoterm/frontend/preference/NeoPreference.kt
+++ b/app/src/main/java/io/neoterm/frontend/preference/NeoPreference.kt
@@ -138,7 +138,7 @@ object NeoPreference {
     }
 
     fun getLoginShell(): String {
-        val loginProgramName = loadString(R.string.key_general_shell, "sh")
+        val loginProgramName = loadString(R.string.key_general_shell, DefaultPreference.loginShell)
 
         // Some programs like ssh needs it
         val shell = File(NeoTermPath.NEOTERM_SHELL_PATH)
@@ -179,7 +179,7 @@ object NeoPreference {
     }
 
     fun getFontSize(): Int {
-        return loadInt(NeoPreference.KEY_FONT_SIZE, 30)
+        return loadInt(NeoPreference.KEY_FONT_SIZE, DefaultPreference.fontSize)
     }
 
 
diff --git a/app/src/main/java/io/neoterm/frontend/session/shell/ShellTermSession.kt b/app/src/main/java/io/neoterm/frontend/session/shell/ShellTermSession.kt
index 690b19b..e83ff86 100644
--- a/app/src/main/java/io/neoterm/frontend/session/shell/ShellTermSession.kt
+++ b/app/src/main/java/io/neoterm/frontend/session/shell/ShellTermSession.kt
@@ -4,6 +4,7 @@ import android.content.Context
 import io.neoterm.App
 import io.neoterm.R
 import io.neoterm.backend.TerminalSession
+import io.neoterm.frontend.preference.DefaultPreference
 import io.neoterm.frontend.session.shell.client.TermSessionCallback
 import io.neoterm.frontend.preference.NeoPreference
 import io.neoterm.frontend.preference.NeoTermPath
@@ -183,7 +184,8 @@ open class ShellTermSession private constructor(shellPath: String, cwd: String,
                 var ldPreloadEnv = ""
 
                 // execve(2) wrapper to avoid incorrect shebang
-                if (NeoPreference.loadBoolean(R.string.key_general_use_execve_wrapper, true)) {
+                if (NeoPreference.loadBoolean(R.string.key_general_use_execve_wrapper,
+                        DefaultPreference.enableExecveWrapper)) {
                     ldPreloadEnv = "LD_PRELOAD=${App.get().applicationInfo.nativeLibraryDir}/libnexec.so"
                 }
 
diff --git a/app/src/main/java/io/neoterm/frontend/session/shell/client/TermSessionCallback.kt b/app/src/main/java/io/neoterm/frontend/session/shell/client/TermSessionCallback.kt
index 1a769f1..e00f77e 100644
--- a/app/src/main/java/io/neoterm/frontend/session/shell/client/TermSessionCallback.kt
+++ b/app/src/main/java/io/neoterm/frontend/session/shell/client/TermSessionCallback.kt
@@ -7,6 +7,7 @@ import android.media.SoundPool
 import android.os.Vibrator
 import io.neoterm.R
 import io.neoterm.backend.TerminalSession
+import io.neoterm.frontend.preference.DefaultPreference
 import io.neoterm.frontend.preference.NeoPreference
 
 /**
@@ -43,7 +44,7 @@ class TermSessionCallback : TerminalSession.SessionChangedCallback {
     override fun onBell(session: TerminalSession?) {
         val termView = termData?.termView ?: return
 
-        if (NeoPreference.loadBoolean(R.string.key_general_bell, false)) {
+        if (NeoPreference.loadBoolean(R.string.key_general_bell, DefaultPreference.enableBell)) {
             if (soundPool == null) {
                 soundPool = SoundPool.Builder().setMaxStreams(1).build()
                 bellId = soundPool!!.load(termView.context, R.raw.bell, 1)
@@ -51,7 +52,7 @@ class TermSessionCallback : TerminalSession.SessionChangedCallback {
             soundPool?.play(bellId, 1f, 1f, 0, 0, 1f)
         }
 
-        if (NeoPreference.loadBoolean(R.string.key_general_vibrate, false)) {
+        if (NeoPreference.loadBoolean(R.string.key_general_vibrate, DefaultPreference.enableVibrate)) {
             val vibrator = termView.context.getSystemService(Context.VIBRATOR_SERVICE) as Vibrator
             vibrator.vibrate(100)
         }
diff --git a/app/src/main/java/io/neoterm/frontend/session/shell/client/TermViewClient.kt b/app/src/main/java/io/neoterm/frontend/session/shell/client/TermViewClient.kt
index 961e351..409a0e1 100644
--- a/app/src/main/java/io/neoterm/frontend/session/shell/client/TermViewClient.kt
+++ b/app/src/main/java/io/neoterm/frontend/session/shell/client/TermViewClient.kt
@@ -12,6 +12,7 @@ import io.neoterm.backend.KeyHandler
 import io.neoterm.backend.TerminalSession
 import io.neoterm.component.eks.ExtraKeysComponent
 import io.neoterm.frontend.component.ComponentManager
+import io.neoterm.frontend.preference.DefaultPreference
 import io.neoterm.frontend.preference.NeoPreference
 import io.neoterm.frontend.terminal.TerminalViewClient
 
@@ -44,7 +45,8 @@ class TermViewClient(val context: Context) : TerminalViewClient {
     }
 
     override fun shouldBackButtonBeMappedToEscape(): Boolean {
-        return NeoPreference.loadBoolean(R.string.key_generaL_backspace_map_to_esc, false)
+        return NeoPreference.loadBoolean(R.string.key_generaL_backspace_map_to_esc,
+                DefaultPreference.enableBackButtonBeMappedToEscape)
     }
 
     override fun copyModeChanged(copyMode: Boolean) {
@@ -196,7 +198,7 @@ class TermViewClient(val context: Context) : TerminalViewClient {
         }
         // Volume keys as special keys
         val volumeAsSpecialKeys = NeoPreference.loadBoolean(R.string.key_general_volume_as_control,
-                false)
+                DefaultPreference.enableSpecialVolumeKeys)
 
         val inputDevice = event.device
         if (inputDevice != null && inputDevice.keyboardType == InputDevice.KEYBOARD_TYPE_ALPHABETIC) {
@@ -230,7 +232,8 @@ class TermViewClient(val context: Context) : TerminalViewClient {
     private fun updateExtraKeysVisibility(): Boolean {
         val extraKeysView = termData?.extraKeysView ?: return false
 
-        return if (NeoPreference.loadBoolean(R.string.key_ui_eks_enabled, true)) {
+        return if (NeoPreference.loadBoolean(R.string.key_ui_eks_enabled,
+                DefaultPreference.enableExtraKeys)) {
             extraKeysView.visibility = View.VISIBLE
             true
         } else {
diff --git a/app/src/main/java/io/neoterm/frontend/terminal/eks/ExtraKeysView.kt b/app/src/main/java/io/neoterm/frontend/terminal/eks/ExtraKeysView.kt
index cd401ab..e755249 100755
--- a/app/src/main/java/io/neoterm/frontend/terminal/eks/ExtraKeysView.kt
+++ b/app/src/main/java/io/neoterm/frontend/terminal/eks/ExtraKeysView.kt
@@ -8,6 +8,7 @@ import android.widget.GridLayout
 import android.widget.LinearLayout
 import io.neoterm.R
 import io.neoterm.component.eks.NeoExtraKey
+import io.neoterm.frontend.preference.DefaultPreference
 import io.neoterm.frontend.preference.NeoPreference
 import io.neoterm.frontend.preference.NeoTermPath
 import io.neoterm.frontend.session.shell.client.event.ToggleImeEvent
@@ -161,7 +162,8 @@ class ExtraKeysView(context: Context, attrs: AttributeSet) : LinearLayout(contex
         val line = LinearLayout(context)
 
         val layoutParams =
-                if (NeoPreference.loadBoolean(R.string.key_ui_eks_weight_explicit, false))
+                if (NeoPreference.loadBoolean(R.string.key_ui_eks_weight_explicit,
+                        DefaultPreference.enableExplicitExtraKeysWeight))
                     LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 0, 1f)
                 else
                     LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
diff --git a/app/src/main/java/io/neoterm/ui/settings/GeneralSettingsActivity.kt b/app/src/main/java/io/neoterm/ui/settings/GeneralSettingsActivity.kt
index 8101688..e5b6319 100644
--- a/app/src/main/java/io/neoterm/ui/settings/GeneralSettingsActivity.kt
+++ b/app/src/main/java/io/neoterm/ui/settings/GeneralSettingsActivity.kt
@@ -5,6 +5,7 @@ import android.os.Bundle
 import android.view.MenuItem
 import io.neoterm.R
 import io.neoterm.frontend.logging.NLog
+import io.neoterm.frontend.preference.DefaultPreference
 import io.neoterm.frontend.preference.NeoPreference
 import io.neoterm.utils.PackageUtils
 
@@ -19,7 +20,7 @@ class GeneralSettingsActivity : BasePreferenceActivity() {
         supportActionBar?.setDisplayHomeAsUpEnabled(true)
         addPreferencesFromResource(R.xml.setting_general)
 
-        val currentShell = NeoPreference.loadString(R.string.key_general_shell, "sh")
+        val currentShell = NeoPreference.loadString(R.string.key_general_shell, DefaultPreference.loginShell)
         findPreference(getString(R.string.key_general_shell)).setOnPreferenceChangeListener { _, value ->
             val shellName = value.toString()
             val newShell = NeoPreference.findLoginProgram(shellName)
diff --git a/app/src/main/java/io/neoterm/ui/term/NeoTermActivity.kt b/app/src/main/java/io/neoterm/ui/term/NeoTermActivity.kt
index 72d46d9..d89b25a 100644
--- a/app/src/main/java/io/neoterm/ui/term/NeoTermActivity.kt
+++ b/app/src/main/java/io/neoterm/ui/term/NeoTermActivity.kt
@@ -21,6 +21,7 @@ import io.neoterm.App
 import io.neoterm.R
 import io.neoterm.backend.TerminalSession
 import io.neoterm.component.setup.BaseFileInstaller
+import io.neoterm.frontend.preference.DefaultPreference
 import io.neoterm.frontend.session.shell.client.TermSessionCallback
 import io.neoterm.frontend.session.shell.client.TermViewClient
 import io.neoterm.frontend.session.shell.client.event.*
@@ -62,7 +63,8 @@ class NeoTermActivity : AppCompatActivity(), ServiceConnection, SharedPreference
 
         NeoPermission.initAppPermission(this, NeoPermission.REQUEST_APP_PERMISSION)
 
-        val fullscreen = NeoPreference.loadBoolean(R.string.key_ui_fullscreen, false)
+        val fullscreen = NeoPreference.loadBoolean(R.string.key_ui_fullscreen,
+                DefaultPreference.enableFullScreen)
         if (fullscreen) {
             window.setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                     WindowManager.LayoutParams.FLAG_FULLSCREEN)
@@ -99,8 +101,10 @@ class NeoTermActivity : AppCompatActivity(), ServiceConnection, SharedPreference
             return
         }
 
-        if (NeoPreference.loadBoolean(R.string.key_ui_fullscreen, false)
-                || NeoPreference.loadBoolean(R.string.key_ui_hide_toolbar, false)) {
+        if (NeoPreference.loadBoolean(R.string.key_ui_fullscreen,
+                DefaultPreference.enableFullScreen)
+                || NeoPreference.loadBoolean(R.string.key_ui_hide_toolbar,
+                DefaultPreference.enableAutoHideToolbar)) {
             val toolbarHeight = toolbar.height.toFloat()
             val translationY = if (visible) 0.toFloat() else -toolbarHeight
             if (visible) {
@@ -292,7 +296,7 @@ class NeoTermActivity : AppCompatActivity(), ServiceConnection, SharedPreference
 
     override fun onSharedPreferenceChanged(sharedPreferences: SharedPreferences?, key: String?) {
         if (key == getString(R.string.key_ui_fullscreen)) {
-            setFullScreenMode(NeoPreference.loadBoolean(key, false))
+            setFullScreenMode(NeoPreference.loadBoolean(key, DefaultPreference.enableFullScreen))
         } else if (key == getString(R.string.key_customization_color_scheme)) {
             if (tabSwitcher.count > 0) {
                 val tab = tabSwitcher.selectedTab
@@ -661,7 +665,8 @@ class NeoTermActivity : AppCompatActivity(), ServiceConnection, SharedPreference
 
         if (tabSwitcher.count > 1) {
             var index = tabSwitcher.indexOf(tab)
-            if (NeoPreference.loadBoolean(R.string.key_ui_next_tab_anim, false)) {
+            if (NeoPreference.loadBoolean(R.string.key_ui_next_tab_anim,
+                    DefaultPreference.enableSwitchNextTab)) {
                 // 关闭当前窗口后，向下一个窗口切换
                 if (--index < 0) index = tabSwitcher.count - 1
             } else {