Removing a watermark or unwanted objects from a photo can be done using various photo editing tools. Here’s a simple guide:

1. Using Adobe Photoshop:

- Open the photo in Photoshop.

- Select the Clone Stamp Tool or the Healing Brush Tool from the toolbar.

- Hold the Alt key and click on a clean area near the watermark to sample the area.

- Carefully paint over the watermark with the sampled area.

- For more precise removal, use the Content-Aware Fill: Select the area with the watermark, go to Edit > Fill, and choose Content-Aware.

2. Using GIMP (Free Software):

- Open your image in GIMP.

- Use the Clone Tool to sample a clean area by holding Ctrl and clicking, then paint over the watermark.

- Alternatively, use the Heal Tool for blending the watermark area with the surrounding pixels.

3. Online Tools:

- Websites like Ai Eraser or Fotor offer easy-to-use online tools. Upload your image, use the brush to highlight the watermark, and let the software do the rest.

4. Mobile Apps:

- Apps like Snapseed (available on iOS and Android) offer tools like the Healing Tool for quick removal of watermarks and unwanted objects.

Always use these tools ethically and ensure you have the right to edit the image.