diff --git a/gui/KCC.ui b/gui/KCC.ui
index 3bdd917..0b94d42 100644
--- a/gui/KCC.ui
+++ b/gui/KCC.ui
@@ -228,12 +228,12 @@
         </widget>
        </item>
        <item row="2" column="1">
-        <widget class="QCheckBox" name="noDitheringBox">
+        <widget class="QCheckBox" name="outputSplit">
          <property name="toolTip">
-          <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p style='white-space:pre'&gt;Create PNG files instead JPEG.&lt;br/&gt;Quality increase is not noticeable on most of devices.&lt;br/&gt;Output files &lt;span style=&quot; font-weight:600;&quot;&gt;might&lt;/span&gt; be smaller.&lt;br/&gt;&lt;span style=&quot; font-weight:600;&quot;&gt;MOBI conversion will be much slower.&lt;/span&gt;&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+          <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p style='white-space:pre'&gt;&lt;span style=&quot; font-weight:600; text-decoration: underline;&quot;&gt;Unchecked - Automatic mode&lt;br/&gt;&lt;/span&gt;Output will be splitted automatically.&lt;/p&gt;&lt;p style='white-space:pre'&gt;&lt;span style=&quot; font-weight:600; text-decoration: underline;&quot;&gt;Checked - Volume mode&lt;br/&gt;&lt;/span&gt;Every subdirectory will be considered as separate volume.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
          </property>
          <property name="text">
-          <string>PNG output</string>
+          <string>Output split</string>
          </property>
         </widget>
        </item>
@@ -510,7 +510,7 @@
   <tabstop>upscaleBox</tabstop>
   <tabstop>gammaBox</tabstop>
   <tabstop>borderBox</tabstop>
-  <tabstop>noDitheringBox</tabstop>
+  <tabstop>outputSplit</tabstop>
   <tabstop>colorBox</tabstop>
   <tabstop>editorButton</tabstop>
   <tabstop>wikiButton</tabstop>
diff --git a/kcc/KCC_gui.py b/kcc/KCC_gui.py
index dcc9e1b..133d31a 100644
--- a/kcc/KCC_gui.py
+++ b/kcc/KCC_gui.py
@@ -270,8 +270,8 @@ class WorkerThread(QtCore.QThread):
             options.white_borders = True
         elif GUI.borderBox.checkState() == 2:
             options.black_borders = True
-        if GUI.noDitheringBox.isChecked():
-            options.forcepng = True
+        if GUI.outputSplit.isChecked():
+            options.batchsplit = 2
         if GUI.colorBox.isChecked():
             options.forcecolor = True
         if GUI.currentMode > 2:
@@ -646,6 +646,11 @@ class KCCGUI(KCC_ui.Ui_mainWindow):
         else:
             GUI.formatBox.setCurrentIndex(profile['DefaultFormat'])
         GUI.qualityBox.setEnabled(profile['PVOptions'])
+        if str(GUI.formatBox.currentText()) == 'MOBI/AZW3':
+            GUI.outputSplit.setEnabled(True)
+        else:
+            GUI.outputSplit.setEnabled(False)
+            GUI.outputSplit.setChecked(False)
 
     def stripTags(self, html):
         s = HTMLStripper()
@@ -762,7 +767,7 @@ class KCCGUI(KCC_ui.Ui_mainWindow):
                                            'upscaleBox': GUI.upscaleBox.checkState(),
                                            'borderBox': GUI.borderBox.checkState(),
                                            'webtoonBox': GUI.webtoonBox.checkState(),
-                                           'noDitheringBox': GUI.noDitheringBox.checkState(),
+                                           'outputSplit': GUI.outputSplit.checkState(),
                                            'colorBox': GUI.colorBox.checkState(),
                                            'widthBox': GUI.widthBox.value(),
                                            'heightBox': GUI.heightBox.value(),
diff --git a/kcc/KCC_ui.py b/kcc/KCC_ui.py
index 5e718ef..6e2ed50 100644
--- a/kcc/KCC_ui.py
+++ b/kcc/KCC_ui.py
@@ -97,9 +97,9 @@ class Ui_mainWindow(object):
         self.borderBox.setTristate(True)
         self.borderBox.setObjectName("borderBox")
         self.gridLayout_2.addWidget(self.borderBox, 2, 0, 1, 1)
-        self.noDitheringBox = QtWidgets.QCheckBox(self.optionWidget)
-        self.noDitheringBox.setObjectName("noDitheringBox")
-        self.gridLayout_2.addWidget(self.noDitheringBox, 2, 1, 1, 1)
+        self.outputSplit = QtWidgets.QCheckBox(self.optionWidget)
+        self.outputSplit.setObjectName("outputSplit")
+        self.gridLayout_2.addWidget(self.outputSplit, 2, 1, 1, 1)
         self.colorBox = QtWidgets.QCheckBox(self.optionWidget)
         self.colorBox.setObjectName("colorBox")
         self.gridLayout_2.addWidget(self.colorBox, 2, 2, 1, 1)
@@ -219,8 +219,8 @@ class Ui_mainWindow(object):
         mainWindow.setTabOrder(self.webtoonBox, self.upscaleBox)
         mainWindow.setTabOrder(self.upscaleBox, self.gammaBox)
         mainWindow.setTabOrder(self.gammaBox, self.borderBox)
-        mainWindow.setTabOrder(self.borderBox, self.noDitheringBox)
-        mainWindow.setTabOrder(self.noDitheringBox, self.colorBox)
+        mainWindow.setTabOrder(self.borderBox, self.outputSplit)
+        mainWindow.setTabOrder(self.outputSplit, self.colorBox)
         mainWindow.setTabOrder(self.colorBox, self.editorButton)
         mainWindow.setTabOrder(self.editorButton, self.wikiButton)
         mainWindow.setTabOrder(self.wikiButton, self.jobList)
@@ -251,8 +251,8 @@ class Ui_mainWindow(object):
         self.gammaBox.setText(_translate("mainWindow", "Custom gamma"))
         self.borderBox.setToolTip(_translate("mainWindow", "<html><head/><body><p><span style=\" font-weight:600; text-decoration: underline;\">Unchecked - Autodetection<br/></span>Color of margins fill will be detected automatically.</p><p><span style=\" font-weight:600; text-decoration: underline;\">Indeterminate - White<br/></span>Margins will be filled with white color.</p><p><span style=\" font-weight:600; text-decoration: underline;\">Checked - Black<br/></span>Margins will be filled with black color.</p></body></html>"))
         self.borderBox.setText(_translate("mainWindow", "W/B margins"))
-        self.noDitheringBox.setToolTip(_translate("mainWindow", "<html><head/><body><p style=\'white-space:pre\'>Create PNG files instead JPEG.<br/>Quality increase is not noticeable on most of devices.<br/>Output files <span style=\" font-weight:600;\">might</span> be smaller.<br/><span style=\" font-weight:600;\">MOBI conversion will be much slower.</span></p></body></html>"))
-        self.noDitheringBox.setText(_translate("mainWindow", "PNG output"))
+        self.outputSplit.setToolTip(_translate("mainWindow", "<html><head/><body><p style=\'white-space:pre\'><span style=\" font-weight:600; text-decoration: underline;\">Unchecked - Automatic mode<br/></span>Output will be splitted automatically.</p><p style=\'white-space:pre\'><span style=\" font-weight:600; text-decoration: underline;\">Checked - Volume mode<br/></span>Every subdirectory will be considered as separate volume.</p></body></html>"))
+        self.outputSplit.setText(_translate("mainWindow", "Output split"))
         self.colorBox.setToolTip(_translate("mainWindow", "<html><head/><body><p style=\'white-space:pre\'>Disable conversion to grayscale.</p></body></html>"))
         self.colorBox.setText(_translate("mainWindow", "Color mode"))
         self.gammaLabel.setText(_translate("mainWindow", "Gamma: Auto"))