diff --git a/pyzebra/app/panel_param_study.py b/pyzebra/app/panel_param_study.py
index 1b71656..692d169 100644
--- a/pyzebra/app/panel_param_study.py
+++ b/pyzebra/app/panel_param_study.py
@@ -398,7 +398,7 @@ def create():
 
     param_select = Select(
         title="Parameter:",
-        options=["user defined", "temp", "mf"],
+        options=["user defined", "temp", "mf", "h", "k", "l"],
         value="user defined",
         default_size=145,
     )