Site Designer makes it a breeze to experiment with different options. However, if you don’t choose to keep the tested styles, they will still be associated with your project and the CSS that is exported.
The Reset function helps to keep your project code lean and clean. If you have applied styles that no longer need to be associated with a CSS Selector or breakpoint, use the RESET control to erase it.
Adding this to your workflow means you will free your CSS file from bloating up with unused styles and improve your website’s overall performance.