Please enable "Nadir Logo" in camera setting.
Name the Logo as "_logo.png" and save it to current SD card or mobile hard disk.
Turn on the camera to view the preview or take a real-time stitching content, the logo you saved will automatically be cut into round shape to cover the watermark at the bottom.
The aspect ratio of "_logo.png" should be less than 50%. With the width fixed, the radius of the nadir logo will increase as you increase its height. Recommended resolution: 2000px * 150px
Tutorial:
Methods for making logo:
Open Photoshop and import a transparent logo in png format.
Image-Trim, select transparent pixels, cut off redundant pixels.
Distort - Polar Coordinates - Polar to Rectangular.
Image Rotation – 180°
Image-Image Size, modified to 2000 * 150.
Save as _ logo.png and store it in the root directory of the SD card.