What is the Corona Renderer Official Toolbar?

The Corona Renderer Official Toolbar (also known as "Corona Official Toolbar" or "Corona Toolbar" in older versions) has been introduced in Corona Renderer 2. After installing Corona Renderer and launching 3ds Max, it will automatically open at startup. It serves as a convenient tool for quickly accessing most of Corona-specific objects and options:

Buttons from left to right:

For common issues with the toolbar and solutions to them, see this short guide: The Corona Renderer Official Toolbar is not working correctly!