I've not found any solutions to this in forums. Years ago before Photoshop had the artboard feature, we used to be able to see images/objects outside of the canvas. Very similar to how you can in illustrator or InDesign. Reveal all is not a solution because it expands the artboard, which is not helpful. I don't need or want to create additional artboards either. I would love to have an option that, at the very least, can be turned on/off for those of us who desire to do so.