To add a watermark to the video, please follow below instructions:
1. Press "Import " button to load the video file and the watermark image to the Media Library.
2. Drag and drop the video file and the watermark image to the video track and PIP track .
3. Then adjust the size of the image by dragging the small circles around the frame. You could also move it to the position where you need.
4. Then change the duration of the watermark image to the same length as the video by dragging the edge of the image file.