Content libraries are created under the tab Content.

To create a new content library click on +Content Library. When you have clicked, you can give a name to the library.

To add content to a content library click on Manage. On the content page you can also change the settings and take a look at the properties. When opening the tab More you find other options regarding the content library, such as importing and exporting content.

If you want to remove the content library you will have to select it and click on Delete. This is only possible when it is not in use by a template.