The Themes window provides access to numerous user interface schemes, known as themes or skins.
To assign a theme, select one from the Choose Theme pulldown list. The change takes effect immediately.
Click the Disable Themes button to restore the operating system default user interface. On Windows, this button is the same as selecting the Windows theme from the Choose Theme list.
Click the Default Theme button to choose the default theme for this version of Mandelbulb3D. As of version 1.9.9, the default theme is Glossy.
The Save + Exit button closes the window.