diff --git a/nanovna.h b/nanovna.h
index 77fd1d9..cef3b6b 100644
--- a/nanovna.h
+++ b/nanovna.h
@@ -205,6 +205,7 @@ typedef struct {
 
 void plot_init(void);
 void update_grid(void);
+void clear_screen(void);
 void redraw(void);
 void redraw_all(void);
 void force_draw_cells(void);
diff --git a/plot.c b/plot.c
index f9452ce..bf8d823 100644
--- a/plot.c
+++ b/plot.c
@@ -1378,6 +1378,12 @@ draw_cal_status(void)
 }
 
 
+void
+clear_screen(void)
+{
+  ili9341_fill(0, 0, 320, 240, 0);
+}
+
 void
 redraw(void)
 {
diff --git a/ui.c b/ui.c
index cd8d5b9..f44e25c 100644
--- a/ui.c
+++ b/ui.c
@@ -467,7 +467,7 @@ menu_trace_cb(int item)
     uistat.current_trace = item;
     menu_move_back();
     ui_mode_normal();
-    redraw_all();
+    //redraw_all();
   }
 }
 
@@ -493,7 +493,7 @@ menu_format_cb(int item)
   }
 
   ui_mode_normal();
-  redraw_all();
+  //redraw_all();
 }
 
 static void
@@ -566,7 +566,7 @@ menu_trace_op_cb(int item)
   }
   menu_move_back();
   ui_mode_normal();
-  redraw_all();
+  //redraw_all();
 }
 
 static void
@@ -623,7 +623,7 @@ menu_marker_op_cb(int item)
     break;
   }
   ui_mode_normal();
-  redraw_all();
+  //redraw_all();
 }
 
 static void
@@ -1325,8 +1325,9 @@ ui_process_keypad(void)
     }
   }
 
+  clear_screen();
   ui_mode_normal();
-  redraw_all();
+  //redraw_all();
   touch_start_watchdog();
 }