コメント入力欄(TextArea)のすぐ上にある、「Paint」ボタンを押して描くと、
同じスレッドに画像が追加されていきます。
すると、1枚の画像のために1つのthreadを作る必要がなくなり、
1threadにたくさんの画像をpostできるようになります。
If you press the "Paint" button just above the comment input field (TextArea) and draw,
the image will be added to the same thread.
This means you don't need to create a separate thread for one image,
and you can post many images in one thread.
If you post many images in one thread, there is no limit to the number of images you can post.
Feel free to post as many as you like.
However, there are limits to creating many threads.