diff --git a/web/lang/en_gb.php b/web/lang/en_gb.php
index af4f6fd65..08c272bcf 100644
--- a/web/lang/en_gb.php
+++ b/web/lang/en_gb.php
@@ -776,6 +776,8 @@ $SLANG = array(
     'TargetColorspace'      => 'Target colorspace',
     'Removed'                   => 'removed',
     'DeprecatedColoursSetting' => 'Deprecated - will be auto-detected in a future release',
+    'ThisSession'           => 'This Session',
+    'ThisSessionHint'       => 'These settings apply to this browser session only. They are kept in a cookie rather than saved on the server, so they do not affect other sessions or other users.',
     'TimeDelta'             => 'Time Delta',
     'TimelineTip1'          => 'Pass your mouse over the graph to view a snapshot image and event details.',              // Added 2013.08.15.
     'TimelineTip2'          => 'Click on the coloured sections of the graph, or the image, to view the event.',              // Added 2013.08.15.
diff --git a/web/skins/classic/includes/functions.php b/web/skins/classic/includes/functions.php
index 4650e0813..34ab3977f 100644
--- a/web/skins/classic/includes/functions.php
+++ b/web/skins/classic/includes/functions.php
@@ -1918,6 +1918,20 @@ function xhtmlFooter() {
 class ZM_Menu {
   public static $submenuOptionsItems = [];
 
+  // A tab is not always named after its category key. 'display' holds
+  // per-browser state kept in a cookie rather than stored configuration, and
+  // 'web' holds the display settings that are stored, so labelling either one
+  // after its key tells the user the wrong thing.
+  private static $categoryLabels = [
+    'version' => 'Versions',
+    'display' => 'ThisSession',
+    'web'     => 'Display',
+  ];
+
+  private static function categoryLabel($cat) {
+    return translate(isset(self::$categoryLabels[$cat]) ? self::$categoryLabels[$cat] : mb_ucfirst($cat));
+  }
+
   public function __construct(string $typeMenu, array $menuItems) {
 
   }
@@ -1934,7 +1948,7 @@ class ZM_Menu {
         $added = true;
       }
       if ($added) {
-        self::$submenuOptionsItems[$cat] = translate(mb_ucfirst(($cat == 'version') ? 'Versions' : $cat));
+        self::$submenuOptionsItems[$cat] = self::categoryLabel($cat);
         unset($categoriesOptionsInDB[$key]);
       }
     }
@@ -1943,7 +1957,7 @@ class ZM_Menu {
     if (count($categoriesOptionsInDB)) {
       foreach ($categoriesOptionsInDB as $cat) {
         if (!in_array(strtolower($cat), ['dynamic', 'hidden'], $strict = false)) // Prohibited categories
-          self::$submenuOptionsItems[$cat] = translate(mb_ucfirst($cat));
+          self::$submenuOptionsItems[$cat] = self::categoryLabel($cat);
       }
     }
   }
diff --git a/web/skins/classic/views/options.php b/web/skins/classic/views/options.php
index ea2cc5b7c..1914587bb 100644
--- a/web/skins/classic/views/options.php
+++ b/web/skins/classic/views/options.php
@@ -55,6 +55,9 @@ if ($tab == 'display') {
           <form name="optionsForm" method="get" action="?">
             <input type="hidden" name="view" value="<?php echo $view ?>"/>
             <input type="hidden" name="tab" value="<?php echo $tab ?>"/>
+            <!-- #optionsContainer is a flex row, so this has to live inside the
+                 form rather than beside it, or the two share the width. -->
+            <div class="form-text text-muted mb-3"><?php echo translate('ThisSessionHint') ?></div>
             <div class="col button-block">
               <div id="contentButtons">
                 <button value="Save" type="submit"><?php echo translate('Save') ?></button>