migration guide: Update paragraph about monitors

Clarify the new handling of monitors via a listmodel of GdkMonitor
instead of int monitor_num.

diff --git a/docs/reference/gtk/migrating-3to4.xml b/docs/reference/gtk/migrating-3to4.xml
index 0503bf0e13e75683c1f1c5af6c3ff427b98628a9..8597517b03a493570b788470664ad6fd0945ff15 100644 (file)
--- a/docs/reference/gtk/migrating-3to4.xml
+++ b/docs/reference/gtk/migrating-3to4.xml
@@ -892,10 +892,11 @@
     </section>
 
     <section>
-      <title>The gtk_window_fullscreen_on_monitor API has changed</title>
+      <title>Monitor handling has changed</title>
       <para>
-        Instead of a monitor number, gtk_window_fullscreen_on_monitor() now takes a
-        #GdkMonitor argument.
+        Instead of a monitor number, #GdkMonitor is now used throughout. 
+        gdk_display_get_monitors() returns the list of monitors that can be queried
+        or observed for monitors to pass to APIs like gtk_window_fullscreen_on_monitor().
       </para>
     </section>