diff --git a/script/users/X-Treme users/Mg_K_edge_XAS.py b/script/users/X-Treme users/Mg_K_edge_XAS.py
index 909cd375..60feb769 100644
--- a/script/users/X-Treme users/Mg_K_edge_XAS.py	
+++ b/script/users/X-Treme users/Mg_K_edge_XAS.py	
@@ -3,6 +3,9 @@ Estart = 1290.0
 Estop  = 1340.0
 OTFtime = 10.0
 """
+# grating has to be grating 2
+# Exit slit 100.0
+
 
 Estart = 1290.0
 Estop  = 1340.0