Portfolios Tab Works only if page template set to Portfolios Template in Page Attributes
Post Layout : Choose to show the types of Post layouts are there. (1 Column, 1/2 Column, 1/3 Column, 1 and 1/4 Column )
Post Style : Select the blog style.
Allow Grid Space : You can enable / disable the Grid spacing that appears in between each portfolio item displays on the page.
Allow Filters : You can enable / disable the Filters that help you switch and to show the portfolio items of different categories
Post Per Page : You can choose only certain categories using ‘Choose Categories’ option and it will display all the categories of portfolio items, if you haven’t chosen any specific categories.
Please Note : In many themes we will use Gallery instead of Portfolio.