Cool dogs build their own skin

First click the "Cool Dog Music" button in the upper-left corner of the software and select the "Skin and window adjustment" option in the Pull-down menu, as shown in the following illustration:

In the Skin and window Adjustment window we can click on the Add button to add the picture you want, as shown in the following image:

After the picture is added, you can adjust the inserted picture in the editing theme interface, click the "Save" button when the adjustment is finished, as shown in the following image:

After the save is complete, we can see the inserted picture in the software interface, as shown in the following figure.