diff --git a/src/main.cpp b/src/main.cpp
index 50ce02a..685830f 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -2,10 +2,10 @@
 
 //============<configurations>============
 //
-// 'SHOW_SCREEN' : whether if playing info. displayed or not.
+// 'ENABLE_SCREEN' : whether if playing info. displayed or not.
 //
 //============</configurations>============
-//#define SHOW_SCREEN
+//#define ENABLE_SCREEN
 
 //============<audioooo-param>============
 #define GAIN_MAX 1.0 // if 1.0 is too loud, give max. limit here.
@@ -55,6 +55,7 @@ Audio audio;
 String screen_filename = "/___.mp3";
 
 //
+#if defined(ENABLE_SCREEN)
 extern Task screen_cmd_notify_task;
 bool cmd_notify = false;
 void screen_cmd_notify() {
@@ -74,8 +75,6 @@ void screen() {
   display.setTextColor(SSD1306_WHITE);
   display.setTextSize(1);
 
-#if defined(SHOW_SCREEN)
-
   //line1 - mode line (playing / stopped) + notify mark
   display.setCursor(0, line);
   if (audio.isRunning()) display.println("= playing ===");
@@ -91,13 +90,12 @@ void screen() {
   display.println(screen_filename.c_str());
   line += line_step;
 
-#endif
-
   //
   display.display();
   //
 }
 Task screen_task(SCREEN_PERIOD, TASK_FOREVER, &screen, &runner, true);
+#endif
 
 //audio files (wav & mp3)
 String file_list[100]; //<-- later change this to be a vector (variable length)
@@ -206,6 +204,10 @@ void setup() {
   file_index = 0;
   audio.connecttoSD(file_list[file_index].c_str());
   screen_filename = file_list[file_index];
+
+  //clear screen (make it black out, for sure.)
+  display.clearDisplay();
+  display.display();
 }
 
 void loop() {