When I was trying to use vim help.txt file I found I was unable to open the .txt files included in it. Its instruction at the beginning of the file says:
Jump to a subject: Position the cursor on a tag (e.g. |bars|) and hit CTRL-].

But it doesn't work and it shrinks the size of the words on my terminal. I want to know how to open the related files and also how to get my terminal window back to normal.
Thanks in advance!

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