Update README.md

README.md

@@ -14,19 +14,21 @@
 # 📖 Overview
 Chatify is a TUI(Terminal User Interface) tool that combines the OpenAI API with the Spotify API, allowing an AI bot to recommend the music you are looking for through conversation. 
 
-<strong>You can listen to music by selecting from the recommended list. </strong>
+1. You can find the music you are looking for by answering questions.
+2. You can listen to the music by selecting the track recommended by chatify.
+3. You can store results of recommendations as playlists.
 
 # ⚠️ Notice
 Unfortunately, Chatify is currently not free to use; you need to have a Spotify Premium account and pay to use the OpenAI API.
 
-Also, it is recommended that the terminal is set to full-screen size when to use Chatify.
-
 # 👜 Prerequisites
 Chatify requires two things. 
 1. You need to have [a Spotify Premium Account](https://www.spotify.com/premium/) to use Spotify API.
 2. You need to have [a OpenAI account](https://platform.openai.com/login) to use OpenAI API.
 
 # 💻 How to use
+**It is recommended that the terminal is set to full-screen size when to use Chatify.**
+
 ## 1. Install
 ### Homebrew Tap
 ```
@@ -68,5 +70,28 @@ Let's talk to Chatify and embark on a journey to discover new music!
 $ chatify hey
 ```
 
+# ⌨️ Operation
+| Key | Action |
+| ---- | ---- |
+| tab | switch the view |
+| characters | input words |
+| q, ctrl+c | quit |
+| enter | answer, select |
+| ↑, ↓ | move in list |
+| ←, → | turn page |
+
+# 🔨 Options
+## `greeting` command
+###  `-p`, `--port`
+Flag to specify the port number for Spotify authorization. Default number is 8888.
+
+## `hey` command
+### `-n`, `--number`
+Flag to specify the number of recommendations. Default number is 25 and maximum number is 100.
+
+### `-p`, `--playlist`
+Flag to enable chatify to make playlist based on the recommendation. Default is false.
+
+
 # 🪧 License
 Chatify is released under MIT License. See [MIT](https://raw.githubusercontent.com/JunNishimura/Chatify/main/LICENSE)