The document provides instructions for using various viewer controls and marking clips in Smoke. It discusses how to:
- Navigate clips using icon and keyboard controls
- Add overlays like grids, letterboxes and guides to clips
- Use audio desks and video scopes to monitor audio levels and video quality
- Set in and out points on clips and change them
- Organize clips into folders for easier finding and editing
- View clip timelines to see tracks and marked points
The document gives a detailed overview of the various tools available in the Smoke viewer for previewing and preparing clips for editing.