Add a tab to a channel

1. Select  Open Apps at the top right of the channel.

2. Choose an app, like Channel calendar, Excel, or a third-party app. If you don't see an app you want, use   Search for apps. 

3. Select Pin [app name] to this channel.

4. Select Save to add it as a tab. 

Tip: To remove a tab, right-click the tab and select Remove, and then Remove again. 

To add SharePoint lists, libraries, pages, folders, or other items, see Add tabs with SharePoint items.