diff --git a/lib/src/image_file.dart b/lib/src/image_file.dart
index 3c0787f..197d62d 100644
--- a/lib/src/image_file.dart
+++ b/lib/src/image_file.dart
@@ -1,12 +1,16 @@
 import 'dart:typed_data';
 
+/// Store the image data and other information.
 class ImageFile {
   final String name;
   final String extension;
   final Uint8List? bytes;
   final String? path;
 
+  /// returns true if image has path. (For web path is not available)
   bool get hasPath => path != null;
+
+  /// returns size of bytes if image has bytes, else 0.
   int get size => bytes?.length ?? 0;
 
   ImageFile(
diff --git a/lib/src/multi_image_picker_controller.dart b/lib/src/multi_image_picker_controller.dart
index eec09a5..7ac4a84 100644
--- a/lib/src/multi_image_picker_controller.dart
+++ b/lib/src/multi_image_picker_controller.dart
@@ -3,6 +3,8 @@ import 'package:flutter/foundation.dart';
 
 import '../multi_image_picker_view.dart';
 
+/// Controller for the [MultiImagePickerView].
+/// This controller contains all them images that the user has selected.
 class MultiImagePickerController with ChangeNotifier {
   final List<String> allowedImageTypes;
   final int maxImages;
@@ -15,15 +17,22 @@ class MultiImagePickerController with ChangeNotifier {
   }
 
   final List<ImageFile> _images = <ImageFile>[];
+
+  /// Returns [Iterable] of [ImageFile] that user has selected.
   Iterable<ImageFile> get images => _images;
+
+  /// Returns true if user has selected no images.
   bool get hasNoImages => _images.isEmpty;
 
+  /// manually pick images. i.e. on click on external button.
+  /// this method open Image picking window.
+  /// It returns [Future] of [bool], true if user has selected images.
   Future<bool> pickImages() async {
     FilePickerResult? result = await FilePicker.platform.pickFiles(
         allowMultiple: true,
         type: FileType.custom,
         allowedExtensions: allowedImageTypes);
-    if (result != null) {
+    if (result != null && result.files.isNotEmpty) {
       _addImages(result.files
           .where((e) =>
               e.extension != null &&
@@ -47,6 +56,7 @@ class MultiImagePickerController with ChangeNotifier {
     }
   }
 
+  /// Manually re-order image, i.e. move image from one position to another position.
   void reOrderImage(int oldIndex, int newIndex, {bool notify = true}) {
     final oldItem = _images.removeAt(oldIndex);
     oldItem.size;
@@ -56,6 +66,7 @@ class MultiImagePickerController with ChangeNotifier {
     }
   }
 
+  /// Manually remove image from list.
   void removeImage(ImageFile imageFile) {
     _images.remove(imageFile);
     notifyListeners();
@@ -69,3 +80,4 @@ class MultiImagePickerController with ChangeNotifier {
     print(_images);
   }
 }
+
diff --git a/lib/src/multi_image_picker_view.dart b/lib/src/multi_image_picker_view.dart
index fb4eadd..4bed814 100644
--- a/lib/src/multi_image_picker_view.dart
+++ b/lib/src/multi_image_picker_view.dart
@@ -6,6 +6,7 @@ import 'package:flutter_reorderable_grid_view/widgets/reorderable_builder.dart';
 
 import '../multi_image_picker_view.dart';
 
+/// Widget that holds entire functionality of the [MultiImagePickerView].
 class MultiImagePickerView extends StatefulWidget {
   const MultiImagePickerView(
       {Key? key,
@@ -249,14 +250,14 @@ class _ItemView extends StatelessWidget {
                 margin: const EdgeInsets.all(4),
                 padding: const EdgeInsets.all(3),
                 decoration: BoxDecoration(
-                  color: Colors.white.withOpacity(0.2),
+                  color: Colors.white.withOpacity(0.4),
                   shape: BoxShape.circle,
                 ),
                 child: Image.asset(
                   'assets/close-48.png',
                   package: 'multi_image_picker_view',
-                  height: 20,
-                  width: 20,
+                  height: 18,
+                  width: 18,
                 )),
             onTap: () {
               onDelete(file);