diff --git a/API-changes-between-v3.0-and-v3.1.md b/API-changes-between-v3.0-and-v3.1.md
index 095cc21..bbc3d31 100644
--- a/API-changes-between-v3.0-and-v3.1.md
+++ b/API-changes-between-v3.0-and-v3.1.md
@@ -26,10 +26,10 @@ SELECT ... WHERE trait = !@variable!
 
 - `load_map()` with `strict=true` throws an exception on duplicate style names (refs [#3770](https://github.com/mapnik/mapnik/pull/3770), [#3917](https://github.com/mapnik/mapnik/pull/3917)).
 
-
 ## Added
 
  - PGraster: Variable interpolation just like PostGIS plugin (refs [#3618](https://github.com/mapnik/mapnik/pull/3618)).
  - Text simple placement `C` for no displacement (refs [#3596](https://github.com/mapnik/mapnik/pull/3596)).
+ - Layers can be nested, `comp-op` and `opacity` on Layer level are supported (refs [3474](https://github.com/mapnik/mapnik/pull/3474)).
 
 TODO
\ No newline at end of file