Currently there isn’t a known way to do this just yet. The only way I know of is to manually add the html code itself.
You can also have multiple (separate) portfolio pages based on category.
If you need a portfolio with a lot of features and options, I’d recommend searching WordPress for a plugin that can handle what you need. I don’t know of anything specifically, but I have seen plenty of Genesis users who implemented different portfolio/gallery plugins to do what you’re referring to.
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