First, remove the existing background

1. Select the layer: Select the target script track or visual layer with the background to be removed. You can do this from either the timeline or the scene editor.
   
   
2. Enable Green Screen or Chroma Key: In the Layer panel, locate the Visual Effects section. The Green Screen effect will already be listed—toggle it on, and Descript will begin applying the effect. If you're using an actual green screen when recording, Chroma Key will be more effective at removing your background.
   
   A message will appear while Descript analyzes your video and applies the effect. Processing time may vary depending on the file size.
   
   
3. Success! Once processed, the background from your video will be removed. The Green Screen effect can be toggled on or off in your composition without needing to re-process. 

Then, add a new background image to the scene editor

You can upload a custom image to your project files or use a visual from our Stock media library. Add the layer to your scene editor via drag and drop or using the Insert new layer button.

Re-order your layers

From the Scene panel, in the Layers section, you can drag and drop your layers in preferred order.

You can also right-click the layer in the timeline, then use the available options in the menu.