diff --git a/data/m_library/pandasLibrary.js b/data/m_library/pandasLibrary.js
index d1f38172..50d0d173 100644
--- a/data/m_library/pandasLibrary.js
+++ b/data/m_library/pandasLibrary.js
@@ -160,6 +160,11 @@ define([
                     component: 'option_suggest',
                     options: ['None', '0']
                 },
+                {
+                    name: 'delimiter',
+                    type: 'text',
+                    label: 'Delimiter'
+                },
                 {
                     name: 'sep',
                     type: 'text',
diff --git a/js/m_apps/File.js b/js/m_apps/File.js
index 3ae75c07..ba2d3da8 100644
--- a/js/m_apps/File.js
+++ b/js/m_apps/File.js
@@ -6,7 +6,7 @@
  *    Note            : Apps > File
  *    License         : GNU GPLv3 with Visual Python special exception
  *    Date            : 2021. 11. 18
- *    Change Date     :
+ *    Change Date     : 2022. 09. 03
  */
 
 //============================================================================
@@ -147,7 +147,13 @@ define([
         _bindEventByType(pageType) {
             var that = this;
             var prefix = '#vp_file' + pageType + ' ';
-    
+            var fileExtensionArr = [that.state.fileExtension];
+
+            // add tsv dsv ssv extension to csv option
+            if(that.state.fileExtension === 'csv'){
+                fileExtensionArr = fileExtensionArr.concat(['tsv', 'dsv', 'ssv']);
+            }
+            
             // select file type 
             $(this.wrapSelector(prefix + '#fileType')).change(function() {
                 var value = $(this).val();
@@ -157,7 +163,7 @@ define([
                 that.renderPage(pageType);
                 that._bindEventByType(pageType);
             });
-    
+            
             // open file navigation
             $(this.wrapSelector(prefix + '#vp_openFileNavigationBtn')).click(function() {
                 
@@ -165,10 +171,10 @@ define([
                 if (pageType == 'Read') {
                     type = 'open';
                 }
-
+                
                 let fileNavi = new FileNavigation({
                     type: type,
-                    extensions: [ that.state.fileExtension ],
+                    extensions: fileExtensionArr,
                     finish: function(filesPath, status, error) {
                         let {file, path} = filesPath[0];
                         that.state.selectedFile = file;
@@ -244,7 +250,7 @@ define([
         renderPage(pageType) {
             var that = this;
             var prefix = '#vp_file' + pageType + ' ';
-    
+            
             // clear
             $(this.wrapSelector(prefix + '#vp_inputOutputBox table tbody')).html('');
             $(this.wrapSelector(prefix + '#vp_optionBox table tbody')).html('');
@@ -368,7 +374,7 @@ define([
             var sbCode = new com_String;
 
             this.saveState();
-
+            
             var prefix = '#vp_file' + pageType + ' ';
             var userOption = new com_String();
             var userOptValue = $(this.wrapSelector(prefix + '#userOption')).val();
@@ -386,6 +392,8 @@ define([
                     name: 'fileType',
                     type: 'var'
                 });
+                
+
                 var result = pdGen.vp_codeGenerator(this.uuid + ' #vp_fileRead', thisPkg, userOption.toString());
                 sbCode.append(result);
             } else if (pageType == 'Write') {
@@ -394,6 +402,8 @@ define([
                     name: 'fileType',
                     type: 'var'
                 });
+
+
                 var result = pdGen.vp_codeGenerator(this.uuid + ' #vp_fileWrite', thisPkg, userOption.toString());
                 sbCode.append(result);
             }