README modified

README.md

@@ -164,7 +164,7 @@ After the initial text is entered, the user is prompted for additional text. The
 <details>
 <summary><span><img src='./icons/picture.png' style='height:1em;'/></span> <b>Generate Image</b></summary>
 
-The DALL-E API (`dall-e-3` or `dall-e-2`) is used to generate images according to the prompts entered.
+The DALL-E API (`dall-e-3` or `dall-e-2`) is used to generate images according to the prompts entered. See [Image Generation](#image-generation) below.
 
 </details>
 
@@ -274,6 +274,8 @@ The image generation can be executed through the following command, and it is al
 
 <kbd><img width="600" src="./docs/img/image-generation-1.png"></kbd>
 
+When the image generation mode is set to `dall-e-3`, the user's prompt is automatically expanded to a more detailed and specific prompt. You can also edit the expanded prompt and regenerate the image.
+
 <kbd><img width="600" src="./docs/img/image-generation-2.png"></kbd>
 
 <kbd><img width="600" src="./docs/img/image-generation-3.png"></kbd>