diff --git a/novelwriter/__init__.py b/novelwriter/__init__.py
index 488353b3..3f2bc134 100644
--- a/novelwriter/__init__.py
+++ b/novelwriter/__init__.py
@@ -296,7 +296,8 @@ def _createApp(style: str) -> QApplication:
     """Create the app. This is done in a function to make it easier to
     block app creation during testing.
     """
-    app = QApplication([CONFIG.appName, f"-style={style}"])
+    app = QApplication([CONFIG.appName])
+    app.setStyle(style)
     app.setApplicationName(CONFIG.appName)
     app.setApplicationVersion(__version__)
     app.setOrganizationDomain(__domain__)
diff --git a/novelwriter/dialogs/docsplit.py b/novelwriter/dialogs/docsplit.py
index a67aafa7..a2acd53f 100644
--- a/novelwriter/dialogs/docsplit.py
+++ b/novelwriter/dialogs/docsplit.py
@@ -28,13 +28,13 @@ import logging
 
 from PyQt6.QtCore import pyqtSlot
 from PyQt6.QtWidgets import (
-    QAbstractItemView, QComboBox, QDialogButtonBox, QGridLayout, QLabel,
-    QListWidget, QListWidgetItem, QVBoxLayout, QWidget
+    QAbstractItemView, QDialogButtonBox, QGridLayout, QLabel, QListWidget,
+    QListWidgetItem, QVBoxLayout, QWidget
 )
 
 from novelwriter import SHARED
 from novelwriter.extensions.configlayout import NColorLabel
-from novelwriter.extensions.modified import NDialog
+from novelwriter.extensions.modified import NComboBox, NDialog
 from novelwriter.extensions.switch import NSwitch
 from novelwriter.types import QtAccepted, QtDialogCancel, QtDialogOk, QtUserRole
 
@@ -79,7 +79,7 @@ class GuiDocSplit(NDialog):
         self.listBox.setMinimumWidth(400)
         self.listBox.setMinimumHeight(180)
 
-        self.splitLevel = QComboBox(self)
+        self.splitLevel = NComboBox(self)
         self.splitLevel.addItem(self.tr("Split on Heading Level 1 (Partition)"),  1)
         self.splitLevel.addItem(self.tr("Split up to Heading Level 2 (Chapter)"), 2)
         self.splitLevel.addItem(self.tr("Split up to Heading Level 3 (Scene)"),   3)
diff --git a/novelwriter/extensions/modified.py b/novelwriter/extensions/modified.py
index 9bea4c78..4b2f663e 100644
--- a/novelwriter/extensions/modified.py
+++ b/novelwriter/extensions/modified.py
@@ -117,12 +117,19 @@ class NTreeView(QTreeView):
 
 class NComboBox(QComboBox):
 
-    def __init__(self, parent: QWidget | None = None) -> None:
+    def __init__(self, parent: QWidget | None = None, maxItems: int = 15) -> None:
         super().__init__(parent=parent)
         self.setFocusPolicy(Qt.FocusPolicy.StrongFocus)
+        self.setMaxVisibleItems(maxItems)
+
+        # The style sheet disables Fusion style pop-up mode on some platforms
+        # and allows for scrolling of long lists of items
+        self.setStyleSheet("QComboBox {combobox-popup: 0;}")
+
         return
 
     def wheelEvent(self, event: QWheelEvent) -> None:
+        """Only capture the mouse wheel if the widget has focus."""
         if self.hasFocus():
             super().wheelEvent(event)
         else:
diff --git a/novelwriter/extensions/novelselector.py b/novelwriter/extensions/novelselector.py
index ee585a0d..e3b1e93f 100644
--- a/novelwriter/extensions/novelselector.py
+++ b/novelwriter/extensions/novelselector.py
@@ -25,14 +25,19 @@ from __future__ import annotations
 
 import logging
 
+from typing import TYPE_CHECKING
+
 from PyQt6.QtCore import pyqtSignal, pyqtSlot
 from PyQt6.QtGui import QPalette
-from PyQt6.QtWidgets import QComboBox, QWidget
+from PyQt6.QtWidgets import QComboBox
 
 from novelwriter import SHARED
 from novelwriter.constants import nwLabels
 from novelwriter.enum import nwItemClass
 
+if TYPE_CHECKING:
+    from PyQt6.QtWidgets import QWidget
+
 logger = logging.getLogger(__name__)
 
 
diff --git a/novelwriter/types.py b/novelwriter/types.py
index fb0faebd..ead3397f 100644
--- a/novelwriter/types.py
+++ b/novelwriter/types.py
@@ -126,6 +126,7 @@ QtHeaderFixed = QHeaderView.ResizeMode.Fixed
 
 # Scroll Bar Policy
 
+QtScrollAlwaysOn = Qt.ScrollBarPolicy.ScrollBarAlwaysOn
 QtScrollAlwaysOff = Qt.ScrollBarPolicy.ScrollBarAlwaysOff
 QtScrollAsNeeded = Qt.ScrollBarPolicy.ScrollBarAsNeeded