I've downloaded the iPhone 11, iPhone 11 Pro, and iPhone 11 Pro Max product images .psd from here and opened them in photoshop to add my app screenshot to them.
However, I can't for the life of me figure out how to add the screenshot to the layer correctly. It only opens as a new tab and no option will allow me to add it to the other psd. The layer reads "".
Can someone help me with this?