diff --git a/frontend/app_flowy/packages/appflowy_editor/lib/src/document/node.dart b/frontend/app_flowy/packages/appflowy_editor/lib/src/document/node.dart
index 8108883c13..a0c4e33a70 100644
--- a/frontend/app_flowy/packages/appflowy_editor/lib/src/document/node.dart
+++ b/frontend/app_flowy/packages/appflowy_editor/lib/src/document/node.dart
@@ -89,7 +89,7 @@ class Node extends ChangeNotifier with LinkedListEntry<Node> {
     bool shouldNotifyParent = _attributes['subtype'] != attributes['subtype'];
 
     _attributes = composeAttributes(_attributes, attributes) ?? {};
-    // Notify the new attributes
+    // Notifies the new attributes
     // if attributes contains 'subtype', should notify parent to rebuild node
     // else, just notify current node.
     shouldNotifyParent ? parent?.notifyListeners() : notifyListeners();
@@ -137,7 +137,7 @@ class Node extends ChangeNotifier with LinkedListEntry<Node> {
     entry.parent = parent;
     super.insertAfter(entry);
 
-    // Notify the new node.
+    // Notifies the new node.
     parent?.notifyListeners();
   }
 
@@ -146,7 +146,7 @@ class Node extends ChangeNotifier with LinkedListEntry<Node> {
     entry.parent = parent;
     super.insertBefore(entry);
 
-    // Notify the new node.
+    // Notifies the new node.
     parent?.notifyListeners();
   }
 
diff --git a/frontend/app_flowy/packages/appflowy_editor/lib/src/editor_state.dart b/frontend/app_flowy/packages/appflowy_editor/lib/src/editor_state.dart
index 340a8fee07..659e612645 100644
--- a/frontend/app_flowy/packages/appflowy_editor/lib/src/editor_state.dart
+++ b/frontend/app_flowy/packages/appflowy_editor/lib/src/editor_state.dart
@@ -11,7 +11,7 @@ import 'package:appflowy_editor/src/undo_manager.dart';
 class ApplyOptions {
   /// This flag indicates that
   /// whether the transaction should be recorded into
-  /// the undo stack.
+  /// the undo stack
   final bool recordUndo;
   final bool recordRedo;
   const ApplyOptions({
@@ -27,9 +27,9 @@ enum CursorUpdateReason {
 
 /// The state of the editor.
 ///
-/// The state including:
+/// The state includes:
 /// - The document to render
-/// - The state of the selection.
+/// - The state of the selection
 ///
 /// [EditorState] also includes the services of the editor:
 /// - Selection service
@@ -38,8 +38,8 @@ enum CursorUpdateReason {
 /// - Input service
 /// - Toolbar service
 ///
-/// In consideration of collaborative editing.
-/// All the mutations should be applied through [Transaction].
+/// In consideration of collaborative editing,
+/// all the mutations should be applied through [Transaction].
 ///
 /// Mutating the document with document's API is not recommended.
 class EditorState {
diff --git a/frontend/app_flowy/packages/appflowy_editor/lib/src/operation/transaction_builder.dart b/frontend/app_flowy/packages/appflowy_editor/lib/src/operation/transaction_builder.dart
index 9358cb2f2b..1cc1ebfd2e 100644
--- a/frontend/app_flowy/packages/appflowy_editor/lib/src/operation/transaction_builder.dart
+++ b/frontend/app_flowy/packages/appflowy_editor/lib/src/operation/transaction_builder.dart
@@ -12,8 +12,8 @@ import 'package:appflowy_editor/src/operation/operation.dart';
 import 'package:appflowy_editor/src/operation/transaction.dart';
 
 /// A [TransactionBuilder] is used to build the transaction from the state.
-/// It will save make a snapshot of the cursor selection state automatically.
-/// The cursor can be resorted if the transaction is undo.
+/// It will save a snapshot of the cursor selection state automatically.
+/// The cursor can be restored if the transaction is undo.
 class TransactionBuilder {
   final List<Operation> operations = [];
   EditorState state;
@@ -22,24 +22,24 @@ class TransactionBuilder {
 
   TransactionBuilder(this.state);
 
-  /// Commit the operations to the state
+  /// Commits the operations to the state
   commit() {
     final transaction = finish();
     state.apply(transaction);
   }
 
-  /// Insert the nodes at the position of path.
+  /// Inserts the nodes at the position of path.
   insertNode(Path path, Node node) {
     insertNodes(path, [node]);
   }
 
-  /// Insert a sequence of nodes at the position of path.
+  /// Inserts a sequence of nodes at the position of path.
   insertNodes(Path path, List<Node> nodes) {
     beforeSelection = state.cursorSelection;
     add(InsertOperation(path, nodes.map((node) => node.deepClone()).toList()));
   }
 
-  /// Update the attributes of nodes.
+  /// Updates the attributes of nodes.
   updateNode(Node node, Attributes attributes) {
     beforeSelection = state.cursorSelection;
 
@@ -51,7 +51,7 @@ class TransactionBuilder {
     ));
   }
 
-  /// Delete a node in the document.
+  /// Deletes a node in the document.
   deleteNode(Node node) {
     deleteNodesAtPath(node.path);
   }
@@ -60,8 +60,8 @@ class TransactionBuilder {
     nodes.forEach(deleteNode);
   }
 
-  /// Delete a sequence of nodes at the path of the document.
-  /// The length specific the length of the following nodes to delete(
+  /// Deletes a sequence of nodes at the path of the document.
+  /// The length specifies the length of the following nodes to delete(
   /// including the start one).
   deleteNodesAtPath(Path path, [int length = 1]) {
     if (path.isEmpty) {
@@ -112,7 +112,7 @@ class TransactionBuilder {
     );
   }
 
-  /// Insert content at a specified index.
+  /// Inserts content at a specified index.
   /// Optionally, you may specify formatting attributes that are applied to the inserted string.
   /// By default, the formatting attributes before the insert position will be used.
   insertText(TextNode node, int index, String content,
@@ -135,7 +135,7 @@ class TransactionBuilder {
         Position(path: node.path, offset: index + content.length));
   }
 
-  /// Assign formatting attributes to a range of text.
+  /// Assigns formatting attributes to a range of text.
   formatText(TextNode node, int index, int length, Attributes attributes) {
     textEdit(
         node,
@@ -145,7 +145,7 @@ class TransactionBuilder {
     afterSelection = beforeSelection;
   }
 
-  /// Delete length characters starting from index.
+  /// Deletes length characters starting from index.
   deleteText(TextNode node, int index, int length) {
     textEdit(
         node,
@@ -180,7 +180,7 @@ class TransactionBuilder {
     );
   }
 
-  /// Add an operation to the transaction.
+  /// Adds an operation to the transaction.
   /// This method will merge operations if they are both TextEdits.
   ///
   /// Also, this method will transform the path of the operations
@@ -209,7 +209,7 @@ class TransactionBuilder {
     operations.add(op);
   }
 
-  /// Generate a immutable [Transaction] to apply or transmit.
+  /// Generates a immutable [Transaction] to apply or transmit.
   Transaction finish() {
     return Transaction(
       operations: UnmodifiableListView(operations),
diff --git a/frontend/app_flowy/packages/appflowy_editor/lib/src/service/selection_service.dart b/frontend/app_flowy/packages/appflowy_editor/lib/src/service/selection_service.dart
index 1c7aa48d97..bcce83a0c6 100644
--- a/frontend/app_flowy/packages/appflowy_editor/lib/src/service/selection_service.dart
+++ b/frontend/app_flowy/packages/appflowy_editor/lib/src/service/selection_service.dart
@@ -455,8 +455,8 @@ class _AppFlowySelectionState extends State<AppFlowySelection>
     final topLimit = size * 0.3;
     final bottomLimit = size * 0.8;
 
-    /// TODO: It is necessary to calculate the relative speed
-    ///   according to the gap and move forward more gently.
+    // TODO: It is necessary to calculate the relative speed
+    //   according to the gap and move forward more gently.
     if (rect.top >= bottomLimit) {
       if (selection.isSingle) {
         editorState.service.scrollService?.scrollTo(dy + size * 0.2);