How to save, or somehow take a picture of a text post on Tumblr, like these ones?

I'd like to be able to save them, so I can post them on other websites, or send them to people via text, but I don't know how. I know it's not a screenshot, because you can't expand a text post and exclude surrounding posts.
Also, I would like to know how to do it on both a computer using Windows, and an iPhone. Thanks in advance!How to save, or somehow take a picture of a text post on Tumblr, like these ones

I think you mean like this?
I have done it before, but i don't know if it the right way,
You take a screenshot and crop it to only the text and place it over a white background so it looks bigger, using something like pic collage or squaready will probably do you job.
I might have this wrong, sorry if i do.How to save, or somehow take a picture of a text post on Tumblr, like these ones

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