diff --git a/lib/remove-images.lua b/lib/remove-images.lua
index 68c7c5d..217e7f2 100644
--- a/lib/remove-images.lua
+++ b/lib/remove-images.lua
@@ -1,5 +1,7 @@
+-- remove images
 function Image () return {} end
 
+-- remove nav from html page
 function MetaBlocks(m)
   if m.tag == 'nav' then
     return {}