DOC: api change note

jklymak · jklymak · commit d5918752caf9 · 2020-09-16T16:12:19.000-07:00
diff --git a/doc/api/next_api_changes/behavior/18356-JMK.rst b/doc/api/next_api_changes/behavior/18356-JMK.rst
@@ -0,0 +1,8 @@
+Axes3D no longer adds itself to figure
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+New `.Axes3D` objects previously added themselves to figures when they were
+created, which lead to them being added twice if
+`fig.add_subplot(111, projection='3d')` was called.  Now `ax = Axes3d(fig)`
+will need to be explicitly added to the figure with `fig.add_axes(ax)`, as
+also needs to be done for normal `.Axes`.  
