smart objects?? switching backgrounds
I am trying to change the background of a photo -- I started by using one of the tools to remove the parts I don't want then I save it. that then seems to turn my photo into a smart object and I cannot drag and manipulate the replacement background that I want to use.the new background becomes a separate tab and completely obliterates my original. I've done this successfully 100s of times but I think I may have clicked on something in the menu bar or view inadvertently. Help please. I'm using PSE 2019 on a Macbook Pro
