Sometimes in Photoshop you need to flip, skew, or distort one object. You’d think that it was up in the “Image” menu. But no. If you make adjustments there you’ve just changed your whole document. So what if you want to just switch the direction of one object?
With the layer where the object is selected, go up to “Edit” > “Transform” and you’ll see all the things you can do with that object. Now get flipping!