diff --git a/aqt/__init__.py b/aqt/__init__.py
index 3a50634b9..ed44c8d94 100644
--- a/aqt/__init__.py
+++ b/aqt/__init__.py
@@ -258,8 +258,9 @@ def _run(argv=None, exec=True):
         import ctypes
         ctypes.CDLL('libGL.so.1', ctypes.RTLD_GLOBAL)
 
-    # opt in to full hidpi support
-    QCoreApplication.setAttribute(Qt.AA_EnableHighDpiScaling)
+    # opt in to full hidpi support?
+    if not os.environ.get("ANKI_NOHIGHDPI"):
+        QCoreApplication.setAttribute(Qt.AA_EnableHighDpiScaling)
 
     # create the app
     app = AnkiApp(argv)
diff --git a/aqt/webview.py b/aqt/webview.py
index 5cc70cdb9..b6275d772 100644
--- a/aqt/webview.py
+++ b/aqt/webview.py
@@ -159,7 +159,11 @@ class AnkiWebView(QWebEngineView):
             oldFocus.setFocus()
 
     def zoomFactor(self):
-        from aqt import mw
+        # overridden scale factor?
+        webscale = os.environ.get("ANKI_WEBSCALE")
+        if webscale:
+            return float(webscale)
+
         if isMac:
             return 1
         screen = QApplication.desktop().screen()