To be able to preview a site design within the Change the Look experience from Site Settings, create a preview file for each ...

To be able to preview a site design within the Change the Look experience from Site Settings, create a preview file for each master page you've created. Use an existing preview file as a model for creating your own, which should have the same name as the corresponding master page. Along with the composed designs you'll assemble later, these preview files allow users to see how a site design comes together.