This is the 7784th most frequent Turkish word.
kapağında
"On/at the cover of."
Here, 'kapağında' refers to the location 'on the cover', denoting that the picture is situated on the book's cover.
Kitabın kapağında güzel bir resim var.
On the cover of the book, there is a beautiful picture.
In this example, 'kapağında' indicates the area 'on the lid', specifying the location of the note on the box's lid.
Kutunun kapağında bir not gördüm.
I saw a note on the lid of the box.
Here, 'kapağında' describes the exact place 'on the cover', showing where the sticker is attached on the notebook.