Can't get rid of transparent backgrounds/"Flatten Image" as default
About two weeks ago, my Photoshop decided that every photo would open in "Flatten Image" mode...a transparent background. Other than in the past two miserable weeks, I have never used transparent backgrounds nor needed to "flatten image." I'm guessing I hit some button by mistake.
I open images through Bridge; this happens whether I'm opening RAW files or files I've already edited.
I thought the glitch happened by maybe clicking on the little rectangle on the toolbar, down near the bottom, with the circle within it? But clicking on it, or not, doesn't change the transparent default. When I look at "Layers," I don't see any way to change the default backgrounds to non-transparent.
Google indicates this, which may always get rid of transparent backgrounds? But I see no "Properties panel" on the right side of my screen (MacBook):
Go to the Properties panel, found on the right side of the screen. Scroll down to Quick Actions. Click "Remove Background."
As each image I open now has a transparent background, I then have to "flatten" every image to make it a regular image.
What button(s) can I use to get rid of non-stop-default transparent backgrounds? Thanks for any helpful info!
