diff --git a/nw/gui/winmain.py b/nw/gui/winmain.py
index bd0bcfe4..76f98219 100644
--- a/nw/gui/winmain.py
+++ b/nw/gui/winmain.py
@@ -75,6 +75,7 @@ class GuiMain(QMainWindow):
         self.splitView = QSplitter(Qt.Horizontal)
         self.splitView.addWidget(self.docEditor)
         self.splitView.addWidget(self.docViewer)
+        self.splitView.splitterMoved.connect(self._splitViewMove)
 
         self.splitMain = QSplitter(Qt.Horizontal)
         self.splitMain.addWidget(self.treePane)
@@ -557,4 +558,10 @@ class GuiMain(QMainWindow):
         self.docEditor.changeWidth()
         return
 
+    def _splitViewMove(self, pWidth, pHeight):
+        """Alert dependent GUI elements that the main pane splitter has been moved.
+        """
+        self.docEditor.changeWidth()
+        return
+
 # END Class GuiMain