The Design tab contains commands related to the appearance of your slides like page setup and slide orientation. This tab contains groups for Page Setup, Themes and Background.
Figure 30. Design Tab
Figure 31. Page Setup
Located on the Design Tab, the Page Setup group is where you go to set page orientation and margins for printing.
Figure 32. Themes Group
Also on the Design Tab is the Themes Group offering a entire gallery of slide styles. This gallery is full of cool graphic effects you can add to your slides.
You’ll also find the Background group on the Design Tab. This group only contains two commands – Background Styles and Hide Background Graphics
Figure 33. Background Group