Skin

A skin is a collection of graphics, such as buttons and icons, and instructions used to change Opera's look.

To choose a skin, go to View > Skins > Get skins, which takes you to the My Opera community, where multiple skins are available for download. When you have confirmed that you want to download the skin you clicked on, Opera will automatically apply the skin so you can preview it before deciding whether you want to keep it. If you select not to keep the skin, it will be deleted from your computer by Opera.

All of your currently installed skins remain available under View > Skins.

You can also:

Apply a different color scheme to the currently selected skin.
Scale the size of Opera's toolbar buttons.
Enable or disable special effects like button highlighting.