diff --git a/README.md b/README.md
index 902f84f..e36dbf2 100644
--- a/README.md
+++ b/README.md
@@ -1,13 +1,15 @@
 <div align="center">
 
 # AiR
-### AI with Rust.
+
+<h3 style="display: flex; align-items: center; justify-content: center;">
+	AI with Rust ｜ <img src="asset/icon.png" alt="App Icon" style="width: 105; height: 105; margin-left: 10px;">
+</h3>
 
 [![License](https://img.shields.io/badge/License-GPLv3-blue.svg)](https://www.gnu.org/licenses/gpl-3.0)
 [![Checks](https://github.com/hack-ink/air/actions/workflows/checks.yml/badge.svg?branch=main)](https://github.com/hack-ink/air/actions/workflows/checks.yml)
 [![Release](https://github.com/hack-ink/air/actions/workflows/release.yml/badge.svg)](https://github.com/hack-ink/air/actions/workflows/release.yml)
 [![GitHub tag (latest by date)](https://img.shields.io/github/v/tag/hack-ink/air)](https://github.com/hack-ink/air/tags)
-[![GitHub code lines](https://tokei.rs/b1/github/hack-ink/air)](https://github.com/hack-ink/air)
 [![GitHub last commit](https://img.shields.io/github/last-commit/hack-ink/air?color=red&style=plastic)](https://github.com/hack-ink/air)
 
 </div>
@@ -16,17 +18,20 @@
 Built upon [egui](https://github.com/emilk/egui), a fast and cross-platform GUI toolkit written in pure Rust.
 
 ### Components
-These items are static and they used to be called by other stuffs.
+- **Static**: These items are static and are used by other parts of the application.
 
 ### OS
-Provides wrapped APIs to interact with the operating system.
+- **Interaction**: Provides wrapped APIs to interact with the operating system.
 
 ### Services
-These items are time-sensitive and require frequent checking or updating.
-They will be spawned as separate threads and run in the background.
+- **Background Processes**: These items are time-sensitive and require frequent checking or updating. They will be spawned as separate threads and run in the background.
 
 ### State
-Mutable version of the components. Usually, they are `Arc<Mutex<Components>>` in order to sync the state between service and UI.
+- **Synchronization**: Mutable version of the components. Usually, they are `Arc<Mutex<Components>>` in order to sync the state between service and UI.
 
 ### UI
-The user interface components.
+- **User Interface**: The user interface components.
+
+
+## License
+AiR is licensed under the [GPLv3](https://www.gnu.org/licenses/gpl-3.0) license.
diff --git a/asset/icon.png b/asset/icon.png
old mode 100755
new mode 100644
index 2158572..aaa113d
Binary files a/asset/icon.png and b/asset/icon.png differ
diff --git a/src/component/setting.rs b/src/component/setting.rs
index a43cfd4..2fd58e8 100644
--- a/src/component/setting.rs
+++ b/src/component/setting.rs
@@ -38,7 +38,7 @@ impl Setting {
 			},
 		};
 
-		// TODO: validate the setting.
+		// TODO: https://github.com/hack-ink/AiR/issues/62.
 		Ok(toml::from_str(&s)?)
 	}
 
@@ -120,6 +120,7 @@ pub struct Translation {
 	pub b: Language,
 }
 impl Translation {
+	// TODO: https://github.com/hack-ink/AiR/issues/41.
 	pub fn prompt(&self) -> Cow<str> {
 		let default = format!(
 			"As a professional translator and language master, assist me in translating text! \
@@ -183,10 +184,10 @@ pub struct Hotkeys {
 impl Default for Hotkeys {
 	fn default() -> Self {
 		Self {
-			rewrite: "ctrl+t".into(),
-			rewrite_directly: "ctrl+y".into(),
-			translate: "ctrl+u".into(),
-			translate_directly: "ctrl+i".into(),
+			rewrite: "CTRL+T".into(),
+			rewrite_directly: "CTRL+Y".into(),
+			translate: "CTRL+U".into(),
+			translate_directly: "CTRL+I".into(),
 		}
 	}
 }