vertical lines in forwarding emails

You're talking about the Quote level lines. They are removed with the key combination of ⌥+⌘+' and it doesn't have to be done one line at a time. You can select the entire message body and remove the quote level at one time.

Open Keyboard Viewer, has it switched KBs?

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Gail Lawley wrote:

well I was trying to answer the question where the answers were all to copy and paste the item to remove the vertical lines

You might want to post the url of the question you were answering. I don't remember seeing anything like that for many years here.

What are you talking about? Is there a question somewhere that this post is intended to answer? Makes no sense on its own