diff --git a/novelwriter/gui/docviewer.py b/novelwriter/gui/docviewer.py
index 9cf0e418..6745db9d 100644
--- a/novelwriter/gui/docviewer.py
+++ b/novelwriter/gui/docviewer.py
@@ -58,12 +58,13 @@ logger = logging.getLogger(__name__)
 
 class GuiDocViewer(QTextBrowser):
 
+    closeDocumentRequest = pyqtSignal()
     documentLoaded = pyqtSignal(str)
     loadDocumentTagRequest = pyqtSignal(str, Enum)
-    closeDocumentRequest = pyqtSignal()
+    openDocumentRequest = pyqtSignal(str, Enum, str, bool)
     reloadDocumentRequest = pyqtSignal()
-    togglePanelVisibility = pyqtSignal()
     requestProjectItemSelected = pyqtSignal(str, bool)
+    togglePanelVisibility = pyqtSignal()
 
     def __init__(self, parent: QWidget) -> None:
         super().__init__(parent=parent)
@@ -640,6 +641,11 @@ class GuiDocViewHeader(QWidget):
         self.forwardButton.setToolTip(self.tr("Go Forward"))
         self.forwardButton.clicked.connect(self.docViewer.navForward)
 
+        self.editButton = NIconToolButton(self, iSz)
+        self.editButton.setVisible(False)
+        self.editButton.setToolTip(self.tr("Open in Editor"))
+        self.editButton.clicked.connect(self._editDocument)
+
         self.refreshButton = NIconToolButton(self, iSz)
         self.refreshButton.setVisible(False)
         self.refreshButton.setToolTip(self.tr("Reload"))
@@ -658,7 +664,7 @@ class GuiDocViewHeader(QWidget):
         self.outerBox.addSpacing(mPx)
         self.outerBox.addWidget(self.itemTitle, 1)
         self.outerBox.addSpacing(mPx)
-        self.outerBox.addSpacing(iPx)
+        self.outerBox.addWidget(self.editButton, 0)
         self.outerBox.addWidget(self.refreshButton, 0)
         self.outerBox.addWidget(self.closeButton, 0)
         self.outerBox.setSpacing(0)
@@ -692,8 +698,9 @@ class GuiDocViewHeader(QWidget):
         self.outlineButton.setVisible(False)
         self.backButton.setVisible(False)
         self.forwardButton.setVisible(False)
-        self.closeButton.setVisible(False)
+        self.editButton.setVisible(False)
         self.refreshButton.setVisible(False)
+        self.closeButton.setVisible(False)
         return
 
     def setOutline(self, data: dict[str, tuple[str, int]]) -> None:
@@ -727,6 +734,7 @@ class GuiDocViewHeader(QWidget):
         self.outlineButton.setThemeIcon("list")
         self.backButton.setThemeIcon("backward")
         self.forwardButton.setThemeIcon("forward")
+        self.editButton.setThemeIcon("edit")
         self.refreshButton.setThemeIcon("refresh")
         self.closeButton.setThemeIcon("close")
 
@@ -734,6 +742,7 @@ class GuiDocViewHeader(QWidget):
         self.outlineButton.setStyleSheet(buttonStyle)
         self.backButton.setStyleSheet(buttonStyle)
         self.forwardButton.setStyleSheet(buttonStyle)
+        self.editButton.setStyleSheet(buttonStyle)
         self.refreshButton.setStyleSheet(buttonStyle)
         self.closeButton.setStyleSheet(buttonStyle)
 
@@ -776,8 +785,9 @@ class GuiDocViewHeader(QWidget):
         self.backButton.setVisible(True)
         self.forwardButton.setVisible(True)
         self.outlineButton.setVisible(True)
-        self.closeButton.setVisible(True)
+        self.editButton.setVisible(True)
         self.refreshButton.setVisible(True)
+        self.closeButton.setVisible(True)
 
         return
 
@@ -804,6 +814,13 @@ class GuiDocViewHeader(QWidget):
         self.docViewer.reloadDocumentRequest.emit()
         return
 
+    @pyqtSlot()
+    def _editDocument(self) -> None:
+        """Open the document in the editor."""
+        if tHandle := self._docHandle:
+            self.docViewer.openDocumentRequest.emit(tHandle, nwDocMode.EDIT, "", True)
+        return
+
     ##
     #  Events
     ##
diff --git a/novelwriter/gui/outline.py b/novelwriter/gui/outline.py
index cae1cec3..718caee0 100644
--- a/novelwriter/gui/outline.py
+++ b/novelwriter/gui/outline.py
@@ -141,8 +141,10 @@ class GuiOutlineView(QWidget):
 
     def closeProjectTasks(self) -> None:
         """Run closing project tasks."""
+        if self.outlineTree.wasRendered:
+            # If the panel hasn't been drawn yet, those values are incorrect
+            self.outlineData.saveGuiSettings()
         self.outlineTree.closeProjectTasks()
-        self.outlineData.saveGuiSettings()
         self.outlineData.updateClasses()
         self.clearOutline()
         return
@@ -434,6 +436,11 @@ class GuiOutlineTree(QTreeWidget):
     def hiddenColumns(self) -> dict[nwOutline, bool]:
         return self._colHidden
 
+    @property
+    def wasRendered(self) -> bool:
+        """Returns True after the Outline has been rendered once."""
+        return not self._firstView
+
     ##
     #  Methods
     ##
@@ -947,11 +954,12 @@ class GuiOutlineDetails(QScrollArea):
 
     def loadGuiSettings(self) -> None:
         """Run open project tasks."""
-        half = self.width() // 2
+        parent = self.outlineView.parent()  # This widget is rendered already
+        width = parent.width() if isinstance(parent, QWidget) else 1000
         pOptions = SHARED.project.options
         self.mainSplit.setSizes([
-            CONFIG.pxInt(pOptions.getInt("GuiOutlineDetails", "detailsWidth", half)),
-            CONFIG.pxInt(pOptions.getInt("GuiOutlineDetails", "tagsWidth", half))
+            CONFIG.pxInt(pOptions.getInt("GuiOutlineDetails", "detailsWidth", width//3)),
+            CONFIG.pxInt(pOptions.getInt("GuiOutlineDetails", "tagsWidth", 2*width//3))
         ])
         return
 
diff --git a/novelwriter/guimain.py b/novelwriter/guimain.py
index 11dabf78..1bb744f6 100644
--- a/novelwriter/guimain.py
+++ b/novelwriter/guimain.py
@@ -270,6 +270,7 @@ class GuiMain(QMainWindow):
         self.docViewer.closeDocumentRequest.connect(self.closeDocViewer)
         self.docViewer.documentLoaded.connect(self.docViewerPanel.updateHandle)
         self.docViewer.loadDocumentTagRequest.connect(self._followTag)
+        self.docViewer.openDocumentRequest.connect(self._openDocument)
         self.docViewer.reloadDocumentRequest.connect(self._reloadViewer)
         self.docViewer.requestProjectItemSelected.connect(self.projView.setSelectedHandle)
         self.docViewer.togglePanelVisibility.connect(self._toggleViewerPanelVisibility)
@@ -844,33 +845,33 @@ class GuiMain(QMainWindow):
 
     def closeMain(self) -> bool:
         """Save everything, and close novelWriter."""
-        if SHARED.hasProject and SHARED.question("%s<br>%s" % (
+        if SHARED.hasProject and not SHARED.question("%s<br>%s" % (
             self.tr("Do you want to exit novelWriter?"),
             self.tr("Changes are saved automatically.")
         )):
-            logger.info("Exiting novelWriter")
+            return False
 
-            if not SHARED.focusMode:
-                CONFIG.setMainPanePos(self.splitMain.sizes())
-                CONFIG.setOutlinePanePos(self.outlineView.splitSizes())
-                if self.docViewerPanel.isVisible():
-                    CONFIG.setViewPanePos(self.splitView.sizes())
+        logger.info("Exiting novelWriter")
 
-            CONFIG.showViewerPanel = self.docViewerPanel.isVisible()
-            wFull = Qt.WindowState.WindowFullScreen
-            if self.windowState() & wFull != wFull:
-                # Ignore window size if in full screen mode
-                CONFIG.setMainWinSize(self.width(), self.height())
+        if not SHARED.focusMode:
+            CONFIG.setMainPanePos(self.splitMain.sizes())
+            CONFIG.setOutlinePanePos(self.outlineView.splitSizes())
+            if self.docViewerPanel.isVisible():
+                CONFIG.setViewPanePos(self.splitView.sizes())
 
-            if SHARED.hasProject:
-                self.closeProject(True)
-            CONFIG.saveConfig()
+        CONFIG.showViewerPanel = self.docViewerPanel.isVisible()
+        wFull = Qt.WindowState.WindowFullScreen
+        if self.windowState() & wFull != wFull:
+            # Ignore window size if in full screen mode
+            CONFIG.setMainWinSize(self.width(), self.height())
 
-            QApplication.quit()
+        if SHARED.hasProject:
+            self.closeProject(True)
+        CONFIG.saveConfig()
 
-            return True
+        QApplication.quit()
 
-        return False
+        return True
 
     def closeViewerPanel(self, byUser: bool = True) -> bool:
         """Close the document view panel."""
diff --git a/pyproject.toml b/pyproject.toml
index 3a2f2c7c..08f4d999 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -65,3 +65,9 @@ exclude = ["docs/*"]
 [tool.autopep8]
 max_line_length = 99
 ignore = ["E133", "E221", "E226", "E228", "E241", "W503"]
+
+[tool.coverage.run]
+branch = false
+
+[tool.coverage.report]
+precision = 2
diff --git a/tests/test_base/test_base_init.py b/tests/test_base/test_base_init.py
index 0ff69505..6fb691a0 100644
--- a/tests/test_base/test_base_init.py
+++ b/tests/test_base/test_base_init.py
@@ -85,6 +85,7 @@ def testBaseInit_Options(monkeypatch, fncPath):
 
     # Defaults w/None Args
     nwGUI = main()
+    assert nwGUI is not None
     assert logger.getEffectiveLevel() == logging.WARNING
     assert nwGUI.closeMain() == "closeMain"
 
@@ -92,6 +93,7 @@ def testBaseInit_Options(monkeypatch, fncPath):
     nwGUI = main(
         ["--testmode", f"--config={fncPath}", f"--data={fncPath}", "--style=Fusion"]
     )
+    assert nwGUI is not None
     assert logger.getEffectiveLevel() == logging.WARNING
     assert nwGUI.closeMain() == "closeMain"
 
@@ -99,12 +101,14 @@ def testBaseInit_Options(monkeypatch, fncPath):
     nwGUI = main(
         ["--testmode", "--info", f"--config={fncPath}", f"--data={fncPath}"]
     )
+    assert nwGUI is not None
     assert logger.getEffectiveLevel() == logging.INFO
     assert nwGUI.closeMain() == "closeMain"
 
     nwGUI = main(
         ["--testmode", "--debug", f"--config={fncPath}", f"--data={fncPath}"]
     )
+    assert nwGUI is not None
     assert logger.getEffectiveLevel() == logging.DEBUG
     assert nwGUI.closeMain() == "closeMain"
 
@@ -113,6 +117,7 @@ def testBaseInit_Options(monkeypatch, fncPath):
         nwGUI = main(
             ["--testmode", "--help", f"--config={fncPath}", f"--data={fncPath}"]
         )
+    assert nwGUI is not None
     assert nwGUI.closeMain() == "closeMain"
     assert ex.value.code == 0
 
@@ -120,6 +125,7 @@ def testBaseInit_Options(monkeypatch, fncPath):
         nwGUI = main(
             ["--testmode", "--version", f"--config={fncPath}", f"--data={fncPath}"]
         )
+    assert nwGUI is not None
     assert nwGUI.closeMain() == "closeMain"
     assert ex.value.code == 0
 
@@ -128,6 +134,7 @@ def testBaseInit_Options(monkeypatch, fncPath):
         nwGUI = main(
             ["--testmode", "--invalid", f"--config={fncPath}", f"--data={fncPath}"]
         )
+    assert nwGUI is not None
     assert nwGUI.closeMain() == "closeMain"
     assert ex.value.code == 2
 
@@ -135,6 +142,7 @@ def testBaseInit_Options(monkeypatch, fncPath):
     nwGUI = main(
         ["--testmode", f"--config={fncPath}", f"--data={fncPath}", "sample/"]
     )
+    assert nwGUI is not None
     assert nwGUI.closeMain() == "closeMain"
 
 
diff --git a/tests/test_gui/test_gui_docviewer.py b/tests/test_gui/test_gui_docviewer.py
index 30b0f89e..4f391cd8 100644
--- a/tests/test_gui/test_gui_docviewer.py
+++ b/tests/test_gui/test_gui_docviewer.py
@@ -31,7 +31,6 @@ from PyQt5.QtWidgets import QAction, QApplication, QMenu
 from novelwriter import CONFIG, SHARED
 from novelwriter.enum import nwDocAction
 from novelwriter.formats.toqdoc import ToQTextDocument
-from novelwriter.gui.docviewer import GuiDocViewer
 from novelwriter.types import QtModNone, QtMouseLeft
 
 from tests.mocked import causeException
@@ -42,7 +41,8 @@ def testGuiViewer_Main(qtbot, monkeypatch, nwGUI, prjLipsum):
     """Test the document viewer."""
     # Open project
     assert nwGUI.openProject(prjLipsum)
-    docViewer: GuiDocViewer = nwGUI.docViewer
+    docEditor = nwGUI.docEditor
+    docViewer = nwGUI.docViewer
 
     # Select a document in the project tree
     nwGUI.projView.setSelectedHandle("88243afbe5ed8")
@@ -74,6 +74,12 @@ def testGuiViewer_Main(qtbot, monkeypatch, nwGUI, prjLipsum):
     docViewer.docHeader._refreshDocument()
     assert docViewer.toPlainText() == origText
 
+    # Open in editor
+    nwGUI.closeDocument()
+    assert docEditor.docHandle is None
+    docViewer.docHeader._editDocument()
+    assert docEditor.docHandle == docViewer.docHandle
+
     # Select word
     cursor = docViewer.textCursor()
     cursor.setPosition(100)
diff --git a/tests/test_gui/test_gui_guimain.py b/tests/test_gui/test_gui_guimain.py
index 6d151b81..8bdbc45e 100644
--- a/tests/test_gui/test_gui_guimain.py
+++ b/tests/test_gui/test_gui_guimain.py
@@ -100,6 +100,13 @@ def testGuiMain_Launch(qtbot, monkeypatch, nwGUI, projPath):
     assert nwGUI.openProject(projPath) is True
     nwGUI.closeProject()
 
+    # Check that closes can be blocked
+    with monkeypatch.context() as mp:
+        mp.setattr(QMessageBox, "result", lambda *a: QMessageBox.StandardButton.No)
+        assert nwGUI.openProject(projPath) is True
+        assert nwGUI.closeMain() is False
+    nwGUI.closeProject()
+
     # Check that latest release info updated
     assert CONFIG.lastNotes != "0x0"