Haven't been able to find this in the knowledgeable, but is there a shortcode to display the portfolio categories? I'm using shortcodes to build in the Custom Content Grid Item Content, so I'd like to display the category names so users can see them without having to use filters.

Yes, but post grid is not what I want to use. I simply just want the ability to display the categories names where I please, and I can do so via PHP code snippet insertion.

I do not see the portfolio file in there, assuming it's in the portfolio plugin, but I don't know which file to look at.

There is no way to use something like <?php echo esc_attr( $category ); ?> to just display the category names? I don't need to override a template since I'm using shortcodes to make a layout in the custom content box in the portfolio section.