On sites with very large numbers of attributes, displaying all of them in the back end product tab becomes very slow. To overcome this, if a site has more than 25 attributes, Kartris will by default only show the attributes that have been given values. To add new attributes that are not present for a particular product, a search box at the top of the attributes tab is used - add part of any attributes name, submit, and it will appear at the top of the tab, above the existing attributes. Checking the box by an attribute opens it so values can be added. Then the product can be saved to update it.