If you want to showcase a collection of pictures on the desktop, do the following:
Step 1: Open Settings.
Step 2: Click on Personalization.
Step 3: Click on Background.
Step 4: Using the "Background" drop-down menu, select the Slideshow option.
Step 5: Click the Browse button to select the folder with the images.
Step 6: Use the "Change picture every" drop-down menu to select how often the image will rotate.
Step 7: If the order of the images is not important, turn on the Shuffle toggle switch.
Step 8: Using the "Choose a fit" drop-down menu, select the option that best suits the images, including fill, stretch, center, span, etc.