Portfolio content type question

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xerinx12

Portfolio content type question

I'm still not great at drupal. Currently when I go to Portfolio-5col# and click on one of the products' thumbnails tag, it brings me to another page where there is further information/ details about the product. I am happy with the size of the thumbnail but for some reason when you click on the tag and it brings you to the detail page, the image gets very big! Is there a way to resize the image? so that when you click on the thumbnail, the image on the detail page isn't so big

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