Photoshop adds drop shadow to new files by default. How do you change this?

Hi Everyone,

Whenever I create a new file, Photoshop automatically adds a drop shadow to the edges of the document (see attached screen shot). Is there a way to turn this feature off? 

I create the attached file using the following process:



1. File > New
2. Custom
3. 1920 px (L) x 1080 px (H)
4. Resolution: 300 Pixels/Inch
5. Orientation: Landscape
6. “Artboards”: unchecked
7. Color Mode: RGB, 8 Bit
8. Background Contents: White
9. Color Profile: Display
10. Pixel Aspect Ratio: Square Pixels
    
    

I'm using Photoshop 2024 CC 25.11.0, and my OS is Sonoma 14.6.1.

Thanks in advance!