Opera at recent times is popular amongst the browsers. Like personas in Firefox , Opera also allows to change its themes. Infact you have a good collection of Themes of Opera available. This guide will help you on how to change the background image , theme of Opera.
How to Change the Background Theme in Opera
Open Opera Browser.
Press Shift + F12 (Function Key 12)
This will open the Appearance window.
Click on the Find more Skin checkbox to get the list of all themes that are available for use with Opera.
Click on the theme that you like and Press Download button.
The theme will automatically download.
Opera will then prompt you with a message to apply the skin or not. Click on apply.