I purchased the Art Studio app for Ipad and had the hardest time figuring out the controls. The developer web site is really worthless in this regard. After a long search on Google I still had no idea how to add a layer. Here's how. * Bring up your toolbar by clicking the arrow in the lower right corner. * Select layers. * Swipe upward and the layers toolbar will show up. Hope this is useful to some other budding artists.