If you want to change the default slug “ux-portfolio”, please go to “Art Theme(or SEA Theme) > ux-portfolio” to change the slug name, like to eliminate the ux-:
Please make sure the slug name is not occupied by a Page, Category, or Tag. If you set the slug name as “portfolio”, please make sure that there isn’t a Page, Category, or Tag named as “portfolio”.
Please notice that it will not affect the “Plain” option of permalinks(Settings > Permalinks)
