I am currently enrolled in a college course Microsoft Excel 2013 for business. One of our assignments requires us to use the Mesh Theme for our spreadsheet. The book shows exactly where to find it. When I click on the the Themes button under the Page Layout tab, there is no Mesh theme available. The depiction in the book shows double the amount of themes that I have available. Where are they? I have Office 365, so my Excel version is the latest. When I try to go download additional themes, the only Basis theme available is for PowerPoint. Someone please help.