Determines the visual appearance of the inspector for all of its different themes.

Default*

Themes with the “Default” prefix refer to light themes that are the default in the free versions of Unity.

Pro*

Themes with the “Pro” prefix refer to the dark themes that are the default in the paid versions of Unity.

*Classic

Themes with the “Classic” suffix refer to the default theme in Unity versions older than 2019.3.

*Modern

Themes with the “Modern” suffix refer to the default theme in Unity versions 2019.3 and afterwards. This is sometimes also called the “Flat” UI.