diff --git a/src/main.cpp b/src/main.cpp
index 685830f..e883d1a 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -5,7 +5,7 @@
 // 'ENABLE_SCREEN' : whether if playing info. displayed or not.
 //
 //============</configurations>============
-//#define ENABLE_SCREEN
+// #define ENABLE_SCREEN
 
 //============<audioooo-param>============
 #define GAIN_MAX 1.0 // if 1.0 is too loud, give max. limit here.
@@ -51,6 +51,11 @@ Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
 #define I2S_LRC 25
 Audio audio;
 
+//globals
+String file_list[100]; //<-- later change this to be a vector (variable length)
+int file_num = 0;
+int file_index = 0;
+
 //screen task
 String screen_filename = "/___.mp3";
 
@@ -90,6 +95,11 @@ void screen() {
   display.println(screen_filename.c_str());
   line += line_step;
 
+  //line3 - file_index, filenum
+  display.setCursor(0, line);
+  display.println("file i-N : " + String(file_index) + "-" + String(file_num));
+  line += line_step;
+
   //
   display.display();
   //
@@ -98,9 +108,6 @@ 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)
-int file_num = 0;
-int file_index = 0;
 int get_music_list(fs::FS &fs, const char *dirname, uint8_t levels, String wavlist[100])
 {
   Serial.printf("Listing directory: %s\n", dirname);