diff --git a/src/damaris/gui/DamarisGUI.py b/src/damaris/gui/DamarisGUI.py
index ed117dd..3f851c5 100644
--- a/src/damaris/gui/DamarisGUI.py
+++ b/src/damaris/gui/DamarisGUI.py
@@ -3024,6 +3024,18 @@ class BlitSafeCanvas( FigureCanvas ):
     screen. Painting the region right away keeps every regular paint a
     complete one and stays a partial update.
     """
+    def _update_device_pixel_ratio( self, *args, **kwargs ):
+        """Render at logical resolution, ignoring the HiDPI scale factor.
+
+        The stock canvas renders one buffer pixel per physical pixel,
+        four times the pixel count on a scaled screen, which makes the
+        interactive plot sluggish. Capping the ratio at 1 renders a
+        quarter of the pixels; the window system scales the output up.
+        """
+        if self._set_device_pixel_ratio( 1 ):
+            self.queue_resize( )
+            self.queue_draw( )
+
     def blit( self, bbox=None ):
         if bbox is None:
             bbox = self.figure.bbox