diff --git a/nanovna.h b/nanovna.h
index 8ba4f67..625bb3b 100644
--- a/nanovna.h
+++ b/nanovna.h
@@ -122,7 +122,7 @@ void cal_done(void);
 #endif
 #define MAX_FREQ_TYPE 5
 enum stimulus_type {
-  ST_START=0, ST_STOP, ST_CENTER, ST_SPAN, ST_CW
+  ST_START=0, ST_STOP, ST_CENTER, ST_SPAN, ST_CW, ST_DUMMY      // Last is used in marker ops
 };
 
 void set_sweep_points(uint16_t points);
diff --git a/ui.c b/ui.c
index 1296526..840693c 100644
--- a/ui.c
+++ b/ui.c
@@ -796,6 +796,13 @@ static UI_FUNCTION_CALLBACK(menu_marker_op_cb)
       }
     }
     break;
+  case 4: // marker -> ref level
+    {
+    float l = actual_t[markers[active_marker].index];
+    float s_max = value(l)/setting.scale;
+    user_set_reflevel(setting.scale*(floor(s_max)+2));
+    }
+    break;
 #ifdef __VNA__
   case 4: /* MARKERS->EDELAY */
     { 
diff --git a/ui_sa.c b/ui_sa.c
index 376144f..26f32a8 100644
--- a/ui_sa.c
+++ b/ui_sa.c
@@ -1588,20 +1588,19 @@ const menuitem_t menu_marker_select[] = {
 
 
 const menuitem_t menu_marker_ops[] = {
-  { MT_CALLBACK, ST_START,  S_RARROW" START",  menu_marker_op_cb },
-  { MT_CALLBACK, ST_STOP,   S_RARROW" STOP",   menu_marker_op_cb },
-  { MT_CALLBACK, ST_CENTER, S_RARROW" CENTER", menu_marker_op_cb },
-  { MT_CALLBACK, ST_SPAN,   S_RARROW" SPAN",   menu_marker_op_cb },
+  { MT_CALLBACK, ST_START,  S_RARROW" START",    menu_marker_op_cb },
+  { MT_CALLBACK, ST_STOP,   S_RARROW" STOP",     menu_marker_op_cb },
+  { MT_CALLBACK, ST_CENTER, S_RARROW" CENTER",   menu_marker_op_cb },
+  { MT_CALLBACK, ST_SPAN,   S_RARROW" SPAN",     menu_marker_op_cb },
+  { MT_CALLBACK, 4,         S_RARROW" REF LEVEL",menu_marker_op_cb },
   { MT_CANCEL, 0,           S_LARROW" BACK",   NULL },
   { MT_NONE, 0, NULL, NULL } // sentinel
 };
 
-
-
 static const menuitem_t menu_marker[] = {
 //  { MT_SUBMENU,  0, "SELECT\nMARKER",     menu_marker_sel},
   { MT_SUBMENU,  0, "MODIFY\nMARKERS",    menu_marker_select},
-  { MT_SUBMENU,  0, "MARKER OPS",        menu_marker_ops},
+  { MT_SUBMENU,  0, "MARKER\nOPS", menu_marker_ops},
   { MT_SUBMENU,  0, "SEARCH\nMARKER",     menu_marker_search},
   { MT_CANCEL,   0, S_LARROW" BACK", NULL },
   { MT_NONE,     0, NULL, NULL } // sentinel