The "Smooth" button is next to the "Edit" button in the demo playback menu. This button enables the Demo Smoother, the most complex tool in the demo viewer. It lets users override the camera view in match files. Here's a brief instruction on using the Demo Smoother: 1. Launch the game and enable the demo viewer. 2. Click "Smooth," located at the bottom left of the playback menu window. 3. Pause the playback and click the "Reload" button located at the right hand-site to upload the current view data. 4. Click "Show All" to view the entire camera path in the video. 5. Type in values into the "Start Tick" and "End Tick" fields to select a part of the camera path to work with. Click "Select" to confirm. 6. You'll see the selected path highlighted in yellow. Click "Show Original" to view the camera path at the selected time moment. 7. Click the "Lock Camera" checkbox. 8. Hold down the "Drive Camera" button and use the "W," "A," "S," and "D" keys to control the camera view.