Thanks for a quick reply.
I installed a new template, where was already installed menu for portfolios.
exactly this theme: https://www.templatemonster.com/demo/42251.html
What is page with Portfolio 3 columns attributes look like:
https://livedemo00.template-help.com/wordpress_42251/gallery/gallery-3-cols/
what the portfolio look like:
https://livedemo00.template-help.com/wordpress_42251/portfolio-view/slideshow-format/
I want to set, that on the page I create with portfolio 3 columns attributes, there are portfolio post only from a specific category.
EDIT: Page attributes portfolio 3 columns are at Template form…
PRTSCR: https://shrani.najdi.si/?F/Cl/4PhAjZGa/portffolilo.png