How can I get more portfolio items on 1 page?

Hi,

I’m trying to get a portfolio page to display more than nine portfolio items. I only have ten, so a second page seems unnecessary.

Here is the page:
http://www.jeffersonridge.com/new/portfolio_category/floorplans/

I looked in the portfolio settings and I didn’t see an option. I know that you can control that sort of thing using shortcodes, but I couldn’t get the page to display the way I wanted using shortcodes. If there is a way to increase the number of portfolio items that this page displays, please let me know.

I am using a child theme, so if this is something that can only be changed through code, I could potentially do it that way. But if there is just a setting that I am missing, that would be better.

Thanks