Mikrotik has made an "one page config" with the quick set option since version 5.16 of the RouterOS. Extremely fast and friendly way of setting up all basic options for Routerbaords, SXT, Sextant and Omnitiks.

 Yes, in order to get more information about skins, please have a look at this page. 
Also, if in any case you would like to remove any skin, simply connect to the Routerboard, go to files menu, inside skins directory there are files with json extension, ie:. <skin name>.json simply delete it.