To add an image overlay above your video such as a logo or the name of the event, you need to create a PNG image the same size as your video size.
You can create this transparent PNG image in Adobe Express, Pixlr or a similar graphic editing software. The PNG image overlay should be the same size as your video. You will see the recommended size under the Choose button in dslrBooth.
You then can download the overlay, save it to your computer, go to dslrBooth, Video or GIF, Image Overlays, Choose. Select the downloaded image.
The overlay will be added on top of the the captured video and not the Pre and Post roll videos.