Filter contains styles with visual effects similar to those in Adobe Photoshop. Filters can be used if you need, for example, to change color shades, to make an element brighter or blur it. Filter values contain the following set of properties:
To add a filter to the theme, click on the "+" icon in front of the category.
To add a background style from the theme to an element, go to the Effect section, click on the icon next to the Filter property and select the filter value you want.