Adding a portfolio section to your Interior Design WordPress theme is a great way to showcase your projects and attract potential clients. To do this, first, navigate to your WordPress dashboard and go to the “Pages” section. Create a new page and name it “Portfolio” or any other suitable title. Next, install a portfolio plugin such as “Portfolio Post Type” or “Envira Gallery” from the WordPress plugin repository. Activate the plugin and configure it according to your preferences. Once the plugin is set up, go back to your “Portfolio” page and add your portfolio items by following the plugin’s instructions. You can include project images, descriptions, categories, and tags for each portfolio item. After adding your portfolio items, save the page and preview it to see your portfolio section in action. You can also customize the layout and design of your portfolio section by adjusting the settings in the plugin or using custom CSS code.