diff --git a/src/calibre/gui2/cover_flow.py b/src/calibre/gui2/cover_flow.py
index fa1584376f..4dcf190bcf 100644
--- a/src/calibre/gui2/cover_flow.py
+++ b/src/calibre/gui2/cover_flow.py
@@ -253,8 +253,7 @@ class CBDialog(QDialog):
             self.resize(w, h)
         self.action_fs_toggle = a = QAction(self)
         self.addAction(a)
-        a.setShortcuts([QKeySequence('F11', QKeySequence.SequenceFormat.PortableText),
-            QKeySequence('Ctrl+Shift+F', QKeySequence.SequenceFormat.PortableText)])
+        a.setShortcuts([QKeySequence(QKeySequence.StandardKey.FullScreen)])
         a.triggered.connect(self.toggle_fullscreen)
         self.action_esc_fs = a = QAction(self)
         a.triggered.connect(self.show_normal)
diff --git a/src/calibre/gui2/preferences/look_feel.py b/src/calibre/gui2/preferences/look_feel.py
index d57a1708a2..0cc011a798 100644
--- a/src/calibre/gui2/preferences/look_feel.py
+++ b/src/calibre/gui2/preferences/look_feel.py
@@ -550,8 +550,8 @@ class ConfigWidget(ConfigWidgetBase, Ui_Form):
         keys = [QKeySequence('F11', QKeySequence.SequenceFormat.PortableText), QKeySequence(
             'Ctrl+Shift+F', QKeySequence.SequenceFormat.PortableText)]
         keys = [unicode_type(x.toString(QKeySequence.SequenceFormat.NativeText)) for x in keys]
-        self.fs_help_msg.setText(unicode_type(self.fs_help_msg.text())%(
-            _(' or ').join(keys)))
+        self.fs_help_msg.setText(self.fs_help_msg.text()%(
+            QKeySequence(QKeySequence.StandardKey.FullScreen).toString(QKeySequence.SequenceFormat.NativeText)))
         self.size_calculated.connect(self.update_cg_cache_size, type=Qt.ConnectionType.QueuedConnection)
         self.tabWidget.currentChanged.connect(self.tab_changed)
 
diff --git a/src/calibre/gui2/preferences/look_feel.ui b/src/calibre/gui2/preferences/look_feel.ui
index 6a8d6f4e0c..9be9c002c0 100644
--- a/src/calibre/gui2/preferences/look_feel.ui
+++ b/src/calibre/gui2/preferences/look_feel.ui
@@ -1244,7 +1244,7 @@ them to all have the same width and height</string>
           <string notr="true">margin-left: 1.5em</string>
          </property>
          <property name="text">
-          <string>You can press the %s keys to toggle full screen mode.</string>
+          <string>You can press the %s key to toggle full screen mode.</string>
          </property>
          <property name="wordWrap">
           <bool>true</bool>