WordPress fix add a few words of text to each project page in a Jetpack portfolio

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add a few words of text to each project page in a Jetpack portfolio, by elainemd

Hi, I’ve been using the Sketch theme for a while, have many portfolio projects with individual pages, such as:
https://www.elaineschattner.com/por...hematician-dies-from-breast-cancer-at-age-40/
(among many)
What I want to do is add a few words, like “To see the original published article, click on the image or link below” – but I don’t know how to do that.

add a few words of text to each project page in a Jetpack portfolio