diff --git a/wolf_tutorial.md b/wolf_tutorial.md
index 36d354e..8fc57e0 100644
--- a/wolf_tutorial.md
+++ b/wolf_tutorial.md
@@ -31,6 +31,10 @@ And unzip it:
 
 		obi ls wolf
 
+	The option -l displays more details:
+	
+		obi ls -l wolf
+
 	You can also check just one view:
 	
 		obi ls wolf/reads1