If you are a network administrator, or the administrator of a single site install, you can upload new themes.  If you have a theme you need added and your permissions do not give you access to the theme uploader, contact your network or site administrator for assistance.

To upload a theme on the network, hover over “My Sites” in the admin bar and click “Themes,” then go to “Add New”.  If you are running a single install, hover over “Appearances” in the dashboard and click “Themes.”   From the theme screen, click “Add New.”  At the top of the screen click “Upload Theme”  Use the desktop browser to located the zipped theme file you want to upload and click “Open.”  Once the file is selected, click install now.

When the theme is finished unpacking, Live Preview will take you to the Customizer for a preview, customizations and activation.  Or click activate to make your new theme live on your site.

The add new themes page lets you search through and preview thousands of themes before you installing them.  “Featured” highlights a few of the available themes.  “Popular” shows  a list of the most downloaded and “Latest” lets you see the most recently added themes.  “Feature Filter” lets you sort through thousands of themes based on color, layout, features and subject.

Hovering over a theme will reveal install, preview and detail options.