The Skin Editor shows the skin preview of the first slide of the project. The preview contains the background color of the slide (if any) or the background image. You may experience performance issues when the skin preview shows the background image because every setting in the Skin Editor dialog box is applied to the preview immediately. To avoid this delay of preview update while editing a skin in the Skin Editor dialog box, you can insert a blank slide as the first slide. Then open the Skin Editor dialog box and define all your skin configurations like playbar controls, positions menu, and borders. After finalizing the skin configuration, you can hide the first slide (the blank slide inserted) and open the Skin Editor dialog box again to preview the final changes. The skin preview will always show the first project slide that is not hidden.