yeah! what I do is I use the crop tool. then I make a random shape(since it doesn't matter) and I click copy and paste. then when the new screen appears I click upload a different image to paste. I upload another image and then you can choose where you want to paste the image and you can change the size and transperancy. then I apply the image and it allows you to upload another image to paste or to paste the same image over again. i hope this helps! :)