diff --git a/doc/export/coretext b/doc/export/coretext
new file mode 100644
index 00000000..8dde0a21
--- /dev/null
+++ b/doc/export/coretext
@@ -0,0 +1,2 @@
+font features are not provided by the collection and have to be added when asking for a font
+TODO does it preserve when going from CTFont to CTFontDescriptor?