diff --git a/cd.sh b/cd.sh
index ea77f6d..6f19a47 100644
--- a/cd.sh
+++ b/cd.sh
@@ -1,7 +1,9 @@
 #! /usr/bin/env sh
 
+# modules
 set "cd" "rwx"
 
+# steps
 cd_main () {
     cd_set_environment
     cd_set_dns_resolving \
@@ -24,7 +26,7 @@ cd_main () {
     cd_execute_python_module "${@}"
 }
 
-#
+# functions
 
 cd_set_environment () {
     cd_step "Set environment"
@@ -270,7 +272,7 @@ ${1}
     "${CD_PYTHON_COMMAND}" -m "${1}" "${CD_STEP}" "${self}"
 }
 
-#
+# tools
 
 cd_cat () {
     if [ -f "${1}" ] ; then
@@ -325,6 +327,5 @@ local text="${2}"
     fi
 }
 
-#
-
+# main
 cd_main "${@}"