diff --git a/README.md b/README.md
index 7b5dfdf..d9e7e51 100644
--- a/README.md
+++ b/README.md
@@ -84,6 +84,25 @@ waydroid session start
 
 The exact Waydroid setup still depends on the Android image, kernel support, graphics driver, and whether Google Apps are installed.
 
+### Fixing a very small Waydroid window
+
+If Waydroid appears as a very small window in the lower-left corner, set its display dimensions while the Waydroid session is running. The following example uses a 1920×1080 display; replace these values with your own screen resolution. When choosing the dimensions, account for desktop panels, taskbars, or docks that occupy part of the screen; subtract their height or width where appropriate:
+
+```bash
+waydroid prop set persist.waydroid.height 1080
+waydroid prop set persist.waydroid.width 1920
+```
+
+Restart the Waydroid session and container so the new dimensions take effect:
+
+```bash
+waydroid session stop
+sudo waydroid container stop
+waydroid show-full-ui
+```
+
+If you are running 12to11 on a non-default Wayland socket, export the socket name before starting the UI as described above.
+
 ## Building the RPM locally
 
 The spec file uses the upstream GitHub snapshot and the project's legacy `imake`/`xmkmf` build system. The package is built with EGL support enabled by the upstream `12to11.conf`.