Enable page buddy on Galaxy Note series, like Note2, Note8 to see related pages and apps when detach S Pen, plug earphone, use dock, or at Roaming. Disable or Enable Page Buddy by doing as follows:
1. Open "Settings" App and go to "Display"
2. Under General setting, tap "Page Buddy" and make sure it is enabled
3. Here you have these 4 options: S Pen page, Earphone page, Docking page, Roaming page
4. If you enable each of the above options, you see related apps, or shortcut when using S pen, earphone, dock or at roaming