diff --git a/indra/newview/app_settings/shaders/shader_hierarchy.txt b/indra/newview/app_settings/shaders/shader_hierarchy.txt
index ebccaddd55..8ef04d8e1f 100644
--- a/indra/newview/app_settings/shaders/shader_hierarchy.txt
+++ b/indra/newview/app_settings/shaders/shader_hierarchy.txt
@@ -1,3 +1,9 @@
+Class 3 is highest quality / lowest  performance
+Class 2 is medium  quality / medium  performance
+Class 1 is lowest  quality / highest performance
+
+Shaders WILL fall back to "lower" classes for functionality.
+
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 avatar/avatarV.glsl - gAvatarProgram, gAvatarWaterProgram
 	main() - avatar/avatarV.glsl