diff --git a/src/addon.ts b/src/addon.ts
index 9160e7d..9df0454 100644
--- a/src/addon.ts
+++ b/src/addon.ts
@@ -1,3 +1,7 @@
+/*
+ * This file defines the plugin's structure.
+ */
+
 import AddonEvents from "./zotero/events";
 import ZoteroViews from "./zotero/views";
 import ReaderViews from "./reader/annotationButton";
diff --git a/src/editor/editorUI.ts b/src/editor/editorUI.ts
index 649bdfa..a8cc500 100644
--- a/src/editor/editorUI.ts
+++ b/src/editor/editorUI.ts
@@ -1,3 +1,7 @@
+/*
+ * This file contains note editor UI code.
+ */
+
 import Knowledge4Zotero from "../addon";
 import { CopyHelper, EditorMessage } from "../utils";
 import AddonBase from "../module";
diff --git a/src/editor/noteExportController.ts b/src/editor/noteExportController.ts
index ae34a1b..b0b4986 100644
--- a/src/editor/noteExportController.ts
+++ b/src/editor/noteExportController.ts
@@ -1,3 +1,7 @@
+/*
+ * This file realizes note export.
+ */
+
 import Knowledge4Zotero from "../addon";
 import { pick } from "../utils";
 import AddonBase from "../module";
@@ -341,9 +345,11 @@ class NoteExport extends AddonBase {
 
   private _getFileName(noteItem: Zotero.Item) {
     return (
-      this._Addon.TemplateController.renderTemplate("[ExportMDFileName]", "noteItem", [
-        noteItem,
-      ]) as string
+      this._Addon.TemplateController.renderTemplate(
+        "[ExportMDFileName]",
+        "noteItem",
+        [noteItem]
+      ) as string
     ).replace(/\\/g, "-");
   }
 }
diff --git a/src/editor/noteExportWindow.ts b/src/editor/noteExportWindow.ts
index ca9b697..94c7e8d 100644
--- a/src/editor/noteExportWindow.ts
+++ b/src/editor/noteExportWindow.ts
@@ -1,3 +1,7 @@
+/*
+ * This file contains note export window code.
+ */
+
 import Knowledge4Zotero from "../addon";
 import AddonBase from "../module";
 
diff --git a/src/editor/noteParse.ts b/src/editor/noteParse.ts
index 0b48863..86afaef 100644
--- a/src/editor/noteParse.ts
+++ b/src/editor/noteParse.ts
@@ -1,3 +1,7 @@
+/*
+ * This file realizes note parse (md, html, rich-text).
+ */
+
 import AddonBase from "../module";
 import { HTML2Markdown, Markdown2HTML } from "./convertMD";
 import TurndownService = require("turndown");
diff --git a/src/editor/noteUtils.ts b/src/editor/noteUtils.ts
index 32b705e..653175c 100644
--- a/src/editor/noteUtils.ts
+++ b/src/editor/noteUtils.ts
@@ -1,3 +1,7 @@
+/*
+ * This file realizes note tools.
+ */
+
 import Knowledge4Zotero from "../addon";
 import AddonBase from "../module";
 
diff --git a/src/index.ts b/src/index.ts
index 35ea863..a223088 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,3 +1,7 @@
+/*
+ * This file is the esbuild entrance.
+ */
+
 import Knowledge4Zotero from "./addon";
 
 Zotero.Knowledge4Zotero = new Knowledge4Zotero();
diff --git a/src/module.ts b/src/module.ts
index 3f5c7cb..688141b 100644
--- a/src/module.ts
+++ b/src/module.ts
@@ -1,3 +1,8 @@
+/*
+ * This file defines the modules' base class.
+ */
+
+
 import Knowledge4Zotero from "./addon";
 
 class AddonBase {
diff --git a/src/reader/annotationButton.ts b/src/reader/annotationButton.ts
index 710d34d..cf4d981 100644
--- a/src/reader/annotationButton.ts
+++ b/src/reader/annotationButton.ts
@@ -1,3 +1,7 @@
+/*
+ * This file contains reader annotation pane code.
+ */
+
 const CryptoJS = require("crypto-js");
 import Knowledge4Zotero from "../addon";
 import AddonBase from "../module";
diff --git a/src/sync/syncController.ts b/src/sync/syncController.ts
index 9ccade1..13c7a10 100644
--- a/src/sync/syncController.ts
+++ b/src/sync/syncController.ts
@@ -1,3 +1,7 @@
+/*
+ * This file realizes the sycn feature.
+ */
+
 import Knowledge4Zotero from "../addon";
 import AddonBase from "../module";
 
diff --git a/src/sync/syncInfoWindow.ts b/src/sync/syncInfoWindow.ts
index ca0b2cc..cacb2be 100644
--- a/src/sync/syncInfoWindow.ts
+++ b/src/sync/syncInfoWindow.ts
@@ -1,3 +1,7 @@
+/*
+ * This file contains sync info window related code.
+ */
+
 import Knowledge4Zotero from "../addon";
 import AddonBase from "../module";
 
diff --git a/src/sync/syncListWindow.ts b/src/sync/syncListWindow.ts
index 4db2e8f..86868c6 100644
--- a/src/sync/syncListWindow.ts
+++ b/src/sync/syncListWindow.ts
@@ -1,3 +1,7 @@
+/*
+ * This file contains sync list window related code.
+ */
+
 import Knowledge4Zotero from "../addon";
 import AddonBase from "../module";
 
@@ -154,9 +158,10 @@ class SyncListWindow extends AddonBase {
       return;
     }
     if (this.useRelated()) {
-      let noteIds: number[] = await this._Addon.SyncController.getRelatedNoteIdsFromNotes(
-        selectedItems
-      );
+      let noteIds: number[] =
+        await this._Addon.SyncController.getRelatedNoteIdsFromNotes(
+          selectedItems
+        );
       selectedItems = Zotero.Items.get(noteIds) as Zotero.Item[];
     }
     for (const note of selectedItems) {
diff --git a/src/template/templateController.ts b/src/template/templateController.ts
index 9fc3fd1..500e303 100644
--- a/src/template/templateController.ts
+++ b/src/template/templateController.ts
@@ -1,3 +1,7 @@
+/*
+ * This file realizes the template feature.
+ */
+
 import Knowledge4Zotero from "../addon";
 import { NoteTemplate } from "../utils";
 import AddonBase from "../module";
diff --git a/src/template/templateWindow.ts b/src/template/templateWindow.ts
index c5df2e4..9d47562 100644
--- a/src/template/templateWindow.ts
+++ b/src/template/templateWindow.ts
@@ -1,3 +1,7 @@
+/*
+ * This file contains template window related code.
+ */
+
 import Knowledge4Zotero from "../addon";
 import { NoteTemplate } from "../utils";
 import AddonBase from "../module";
diff --git a/src/utils.ts b/src/utils.ts
index dade643..3e2a35b 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -1,3 +1,7 @@
+/*
+ * This file contains definitions of commonly used structures.
+ */
+
 class EditorMessage {
   public type: string;
   public content: {
diff --git a/src/wizard.ts b/src/wizard.ts
index ce95a1f..62d89b7 100644
--- a/src/wizard.ts
+++ b/src/wizard.ts
@@ -1,5 +1,5 @@
 /*
- * This file contains the first-run wizard window code
+ * This file contains the first-run wizard window code.
  */
 
 import Knowledge4Zotero from "./addon";
diff --git a/src/workspace/workspaceMenu.ts b/src/workspace/workspaceMenu.ts
index 5c0595e..539ccb1 100644
--- a/src/workspace/workspaceMenu.ts
+++ b/src/workspace/workspaceMenu.ts
@@ -1,3 +1,7 @@
+/*
+ * This file contains workspace menu related code.
+ */
+
 import Knowledge4Zotero from "../addon";
 import { OutlineType } from "../utils";
 import AddonBase from "../module";
diff --git a/src/workspace/workspaceOutline.ts b/src/workspace/workspaceOutline.ts
index 8439be7..7564800 100644
--- a/src/workspace/workspaceOutline.ts
+++ b/src/workspace/workspaceOutline.ts
@@ -1,3 +1,7 @@
+/*
+ * This file contains workspace ontline related code.
+ */
+
 import Knowledge4Zotero from "../addon";
 import { OutlineType } from "../utils";
 import AddonBase from "../module";
diff --git a/src/workspace/workspaceWindow.ts b/src/workspace/workspaceWindow.ts
index 01ce1f9..b845119 100644
--- a/src/workspace/workspaceWindow.ts
+++ b/src/workspace/workspaceWindow.ts
@@ -1,3 +1,7 @@
+/*
+ * This file contains workspace window related code.
+ */
+
 import Knowledge4Zotero from "../addon";
 import { EditorMessage, OutlineType } from "../utils";
 import AddonBase from "../module";
diff --git a/src/zotero/events.ts b/src/zotero/events.ts
index 5b2b95b..b8ddbed 100644
--- a/src/zotero/events.ts
+++ b/src/zotero/events.ts
@@ -1,3 +1,7 @@
+/*
+ * This file contains the life-time and UI events.
+ */
+
 import Knowledge4Zotero from "../addon";
 import { CopyHelper, EditorMessage } from "../utils";
 import AddonBase from "../module";
diff --git a/src/zotero/views.ts b/src/zotero/views.ts
index 44beed4..7913dc1 100644
--- a/src/zotero/views.ts
+++ b/src/zotero/views.ts
@@ -1,3 +1,7 @@
+/*
+ * This file contains the Zotero UI code.
+ */
+
 import Knowledge4Zotero from "../addon";
 import { EditorMessage } from "../utils";
 import AddonBase from "../module";