Change Themes in the Opera Web Browser

Modify wallpaper, fonts, and Opera's user-interface elements

Adding and changing the appearance of Opera is a breeze. Modern versions of Opera include support for wallpapers, font configuration, and a dark user interface. Older versions of Opera supported themes, but the browser no longer supports dedicated theme files.

These procedures work on all currently supported versions of Opera for Windows and Mac, regardless of the operating-system version. This process was tested using Opera version 69.

Open the Settings or Preferences Menu

Select the Opera settings icon(gear), located at the bottom of the left side menu of your browser window. When the drop-down menu appears, select the Settings option (Windows) or the Preferences option (macOS).

Alternative, use the Alt+P keyboard shortcut on Windows or the Cmd+, shortcut on macOS.

Customize Your Browser

opera themes

Opera supports two types of customizations: wallpapers and general-appearance tweaks.

Wallpapers

In the Wallpapers section of the Settings window, slide the Enable wallpapers button to allow for a background image. This wallpaper appears in the back of certain default browser tabs. Pick from the list, or select either Add your wallpaper to upload an image or Get more wallpapers to visit Opera's add-ons site.

Appearance Tweaks

Toggle the sliders to activate a dark theme or reveal the bookmarks bar.

Use the drop-down menu to change the font size of the application, or select Customize fonts to change the fonts your browser uses. You'll be able to pick a standard system font as well as specific options for a serif, sans-serif, and fixed-width font, as websites specify.

Customize the Sidebar

Opera sidebar

The sidebar—which runs along the left edge of the browser—includes a handful of stock elements. Use the sliders to show or hide the sidebar and to show or hide notification badges for each of those elements.

Add a check to the box to show an icon for that element in the sidebar. Remove checks to suppress the item.