adding pics to slideshow

I used to be able to choose whatever pictures that were in my computer to show in a slideshow when not using my PC. I would go to personalization and all my pics would have a little checkbox to choose if I wished. I am unable to do that now and so my slideshow is doomed to the same pics forever. How can I control what to put on my screen while my PC is not in use. Thanks in advance.

Have you had a look at the following tutorial? In option 5 item 7 there are some details about setting up pictures for a slideshow.

https://www.tenforums.com/tutorials/4...dows-10-a.html

Hope this helps!