docs: update

README.md

@@ -35,6 +35,8 @@ _/\ __)/_)    pkgs   130
 # NOTE: If 'ascii' will be used, it must come first.
 # Default: first example below
 # Valid: space separated string
+#
+# OFF by default: shell
 PF_INFO="ascii title distro host kernel uptime pkgs memory"
 
 # Example: Only ASCII.