@robdomenech – I’m not certain of the best way to do this myself. One way to do it is to go to the top left where you can change 3D viewport to, say Image Editor. From the editor in the middle top of the screen you’ll have a dropdown with all your images listed.
I’m not certain that’s the best way to do things, but it’s one way. I like having all my images packed into the scene, where practical, but it can make managing the images a bit trickier.