How do I delete what I pasted (even images are pasted) from this article?

What I understand from your question is that you were composing an email, and wanted to copy/paste some of the text from the article into the email. Instead, you copy/pasted the entire article, including images, into the email and now want to delete it.

If this had happened to me by accident, what I would do immediately is to simultaneously hold down the Control button and Z. This will “undo” whatever you just did, which in this case was to paste the article. That should remove it with the least amount of work. However, unless you do it right away (meaning if you did any other computer work after the “paste”), it probably won’t work.

The next thing I would do is to open a new Compose window, and copy the parts of the email that I want to keep into the new window. Then I would discard the draft that contained the whole article.

My last choice would be to highlight the article as it exists in the Compose window, and delete it. Mainly, this is because if I copied everything from the web page that contained the article, I wouldn’t want to risk clicking on any links that were accidentally included. The article is from Slate, though, so you are probably safe. Deleting things like pictures from a gmail Compose window usually requires clicking on the image, then hitting the Delete button – separately from deleting the text. That might be why you were having trouble.

Any of these methods should work. Just pick the one that seems easiest to you, and give it a try. If it doesn’t work to your satisfaction, try another.

@glacial Thank you. It got deleted, before your answer got posted. Don’t ask me what I did, I was just doing the usual copy, delete. Very strange. But I was hoping someone would try it to see what I saw. I don’t have the vocabulary for what I saw. It is more than just that it refused to get deleted.