The theme editor consists of several sections. Among the ready-made wallpaper templates there are landscapes, textures, architecture, works by artists from different countries, nature and much more. You can also upload your own image.
It is also possible to adjust the display of wallpaper for yourself, for example, to set a changing background.
The new sidebar is already available in the latest version of Chrome for PC. After updating the browser, the button to deploy it should appear in the lower right corner.