Here you can see the list of existing stylesheets. You can edit (), delete () or export () the listed items. You can also create a new sheet using the New CSS stylesheet button. After clicking the icon in the header of the Actions column, a context menu is displayed, offering options for export of listed data to various types of files.
Additional information about CSS stylesheets in Kentico CMS can be found in Developer's Guide -> Development -> CSS stylesheets and design.