Okay, this is an annoying problem, and I can’t find anything that helps.
I upload an image to use as a reference to make a character model, but it doesn’t show up on the 3D view. It was working fine the very first time I used it, but now it’s not doing anything. Isn’t it supposed to automatically pop-up on the screen as soon as you upload it?
Ensure you are in orthographic view and the view set in the background image settings (front, top, right etc)
Toggle between orthographic and perspective view with numpad 5 (you’ll see the view name in the top left corner of the 3d view)
For more help show a screenshot of the whole blend interface and attache/link to your blend file
When you load your image you may want to pack it in your blend file so the link doesn’t get broken (File / External Data menu)