Click Creator and Session. You will then see the Clipboard screen (see above) where you can add tags to your session, coaching notes etc. Click the green tick in the top left of the window to confirm your settings.
To add documents to your session, simply click the panel with the + icon at the bottom of the screen. This takes you to your Library to select from your documents. Click the + next to each one to add them to your session. You can add a document multiple times by clicking the + multiple times.