Clickable yellow triangles do the same as the Shift F5 keystroke.

Author: mbm-OR

Source/RunActivity/Viewer3D/Popups/TrainDrivingWindow.cs

@@ -375,6 +375,7 @@ protected override ControlLayout Layout(ControlLayout layout)
                             var expandWindow = normalTextMode ? '\u25C4' : '\u25BA';// ◀ : ▶
                             hbox.Add(ExpandWindow = new Label(hbox.RemainingWidth - TextSize, 0, TextSize, hbox.RemainingHeight, expandWindow.ToString(), LabelAlignment.Right));
                             ExpandWindow.Color = Color.Yellow;
+                            ExpandWindow.Click += new Action<Control, Point>(ExpandWindow_Click);
                         }
                         // Separator line
                         if (data.FirstCol.Contains("Sprtr"))
@@ -394,6 +395,12 @@ void FontToBold_Click(Control arg1, Point arg2)
             UpdateWindowSize();
         }
 
+        void ExpandWindow_Click(Control arg1, Point arg2)
+        {
+            normalTextMode = !normalTextMode;
+            UpdateWindowSize();
+        }
+
         public override void TabAction() => CycleMode();
 
         /// <summary>