diff --git a/Packages/src/README.md b/Packages/src/README.md
index 5bb3300..e766976 100644
--- a/Packages/src/README.md
+++ b/Packages/src/README.md
@@ -1,28 +1,62 @@
-# 
Particle Effect For UGUI (UI Particle)
-
-This package provides a component to render particle effects for uGUI in Unity 2018.2 or later.
-The particle rendering is maskable and sortable, without the need for an extra Camera, RenderTexture, or Canvas.
+# Particle Effect For UGUI (UI Particle)
[](https://openupm.com/packages/com.coffee.ui-particle/)
-[](https://github.com/mob-sakai/ParticleEffectForUGUI/releases)
-[](https://github.com/mob-sakai/ParticleEffectForUGUI/blob/main/LICENSE.txt)
+[](https://github.com/mob-sakai/ParticleEffectForUGUI/releases)
+[](https://github.com/mob-sakai/ParticleEffectForUGUI/blob/main/LICENSE.md)
+
+
[](http://makeapullrequest.com)
+[](https://github.com/mob-sakai/ParticleEffectForUGUI/subscription)
[](https://twitter.com/intent/follow?screen_name=mob_sakai)
-<< [📝 Description](#-description) | [🎮 Demo](#-demo) | [⚙ Installation](#-installation) | [🚀 Usage](#-usage) | [🛠 Development Note](#-development-note) | [🤝 Contributing](#-contributing) >>
+<< [📝 Description](#-description-) | [📌 Key Features](#-key-features) | [🎮 Demo](#-demo) | [⚙ Installation](#-installation) | [🔄 Upgrading to 5.x](#-upgrading-from-3x4x-to-5x) | [🚀 Usage](#-usage) | [🛠 Development Note](#-development-note) | [🤝 Contributing](#-contributing) >>
+
+## 📝 Description
+
+
+
+This package uses the new APIs `MeshBake/MeshTrailBake` (introduced in Unity 2018.2) to render particles through `CanvasRenderer`.
+You can render, mask, and sort your `ParticleSystems` for UI without the need for an additional `Camera`, `RenderTexture`, or `Canvas`.
+
+- [📌 Key Features](#-key-features)
+- [🎮 Demo](#-demo)
+- [⚙ Installation](#-installation)
+ - [Install via OpenUPM](#install-via-openupm)
+ - [Install via UPM (with Package Manager UI)](#install-via-upm-with-package-manager-ui)
+ - [Install via UPM (Manually)](#install-via-upm-manually)
+ - [Install as Embedded Package](#install-as-embedded-package)
+- [🔄 Upgrading from 3.x/4.x to 5.x](#-upgrading-from-3x4x-to-5x)
+ - [Breaking Changes](#breaking-changes)
+- [🚀 Usage](#-usage)
+ - [Component: UIParticle](#component-uiparticle)
+ - [Basic Usage](#basic-usage)
+ - [Usage with Your Existing ParticleSystem Prefab](#usage-with-your-existing-particlesystem-prefab)
+ - [Usage with `Mask` or `RectMask2D` Component](#usage-with-mask-or-rectmask2d-component)
+ - [Usage with Script](#usage-with-script)
+ - [Component: UIParticleAttractor](#component-uiparticleattractor)
+- [🛠 Development Note](#-development-note)
+ - [Compares the Baking mesh approach with the conventional approach](#compares-the-baking-mesh-approach-with-the-conventional-approach)
+ - [Performance test results](#performance-test-results)
+ - [🔍 FAQ: Why Are My UIParticles Not Displayed Correctly?](#-faq-why-are-my-uiparticles-not-displayed-correctly)
+ - [Shader Limitation](#shader-limitation)
+ - [Built-in shaders are not supported](#built-in-shaders-are-not-supported)
+ - [(Unity 2018 or 2019) UV.zw components will be discarded](#unity-2018-or-2019-uvzw-components-will-be-discarded)
+ - [(Unity 2018 or 2019) Custom vertex streams](#unity-2018-or-2019-custom-vertex-streams)
+ - [Overheads](#overheads)
+ - [How to Make a Custom Shader to Support `Mask` and `RectMask2D` Component](#how-to-make-a-custom-shader-to-support-mask-and-rectmask2d-component)
+- [🤝 Contributing](#-contributing)
+ - [Issues](#issues)
+ - [Pull Requests](#pull-requests)
+ - [Support](#support)
+- [License](#license)
+- [Author](#author)
+- [See Also](#see-also)
-## 📝 Description
-
-
-
-This package uses the new APIs `MeshBake/MeshTrailBake` (introduced in Unity 2018.2) to render particles through CanvasRenderer.
-You can render, mask, and sort your ParticleSystems for UI without the need for an additional Camera, RenderTexture, or Canvas.
-
-### Key Features
+## 📌 Key Features
* **Easy to use:** The package is ready to use out of the box.
* **Sortable:** Sort particle effects and other UI elements by sibling index.
@@ -83,16 +117,16 @@ _This package requires **Unity 2018.3 or later**._
```
- To update the package, use Package Manager UI (`Window > Package Manager`) or run the following command with `@{version}`:
```
- openupm add com.coffee.ui-particle@4.8.0
+ openupm add com.coffee.ui-particle@4.9.0
```
#### Install via UPM (with Package Manager UI)
- Click `Window > Package Manager` to open Package Manager UI.
- Click `+ > Add package from git URL...` and input the repository URL: `https://github.com/mob-sakai/ParticleEffectForUGUI.git`
- 
+ 
- To update the package, change suffix `#{version}` to the target version.
- - e.g. `https://github.com/mob-sakai/ParticleEffectForUGUI.git#4.8.0`
+ - e.g. `https://github.com/mob-sakai/ParticleEffectForUGUI.git#4.9.0`
#### Install via UPM (Manually)
@@ -107,7 +141,7 @@ _This package requires **Unity 2018.3 or later**._
```
- To update the package, change suffix `#{version}` to the target version.
- - e.g. `"com.coffee.ui-particle": "https://github.com/mob-sakai/ParticleEffectForUGUI.git#4.8.0",`
+ - e.g. `"com.coffee.ui-particle": "https://github.com/mob-sakai/ParticleEffectForUGUI.git#4.9.0",`
#### Install as Embedded Package
@@ -119,7 +153,7 @@ _This package requires **Unity 2018.3 or later**._
-## ⚙ Upgrading from 3.x/4.x to 5.x
+## 🔄 Upgrading from 3.x/4.x to 5.x
### Breaking Changes
@@ -132,7 +166,7 @@ _This package requires **Unity 2018.3 or later**._
## 🚀 Usage
-### UIParticle Component
+### Component: UIParticle
`UIParticle` controls the ParticleSystems that are attached to its own game objects and child game objects.
@@ -165,7 +199,7 @@ and z-position.
-#### Basic Usage
+### Basic Usage
1. Select `GameObject/UI/ParticleSystem` to create UIParticle with a ParticleSystem.
@@ -174,7 +208,7 @@ and z-position.
-#### With Your Existing ParticleSystem Prefab
+### Usage with Your Existing ParticleSystem Prefab
1. Select `GameObject/UI/ParticleSystem (Empty)` to create UIParticle.
@@ -183,7 +217,7 @@ and z-position.
-#### With `Mask` or `RectMask2D` Component
+### Usage with `Mask` or `RectMask2D` Component
If you want to mask particles, set a stencil-supported shader (such as `UI/UIAdditive`) to the material for
ParticleSystem.
@@ -195,7 +229,7 @@ section.
-### Script usage
+### Usage with Script
```cs
// Instantiate ParticleSystem prefab with UIParticle on runtime.
@@ -214,14 +248,14 @@ uiParticle.Stop();
-### UIParticleAttractor component
+### Component: UIParticleAttractor
`UIParticleAttractor` attracts particles generated by the specified ParticleSystem.
-- **Particle System**: Attracts particles generated by the specified particle system.
+- **Particle Systems**: Attracts particles generated by the specified ParticleSystems.
- **Destination Radius**: Once the particle is within the radius, the particle lifetime will become 0, and `OnAttracted`
will be called.
- **Delay Rate**: Delay to start attracting. It is a percentage of the particle's start lifetime.
@@ -366,7 +400,7 @@ When improving performance, keep the following in mind:
- Consider a single material, atlasing the sprites, and using `Sprite` mode in the `Texture Sheet Animation` module
in the ParticleSystem.
-### How to Make a Custom Shader to Support Mask/RectMask2D Component
+### How to Make a Custom Shader to Support `Mask` and `RectMask2D` Component
Shader tips