To burn-in a banner or logo you can use the overlay features.

Below each source you find a row with numbers.

When you click on e.g. 1 it will turn green and project this source on top of the output.

  • Add a new image source via Add Input in the lower left corner (use a transparent PNG for the best result)

  • Now Click on 1 below the new image source

The logo is projected on top of the output preview but too large.

  • Click on the settings icon below the image source and change the main position settings.

Since you already enabled the overlay you can immediately see the result.