I enlarged the photo and could see stitches. I think the buttons are added, though.

Thank you. I guess my enlarged copy was not as clear as yours. I appreciate your response!

I agree with jsimon that it looks like stitches on the enlarged version.

If you want to zoom in further in any window, hold down the ctrl button and hit the + button. It will zoom in a percentage each time you hit +. To go smaller again, keep holding down ctrl and hit the - on the keyboard. :)