The High Definition Render Pipeline (HDRP) components expose standard properties by default that are suitable for most use-cases. However, some HDRP components include more options which you can use to fine-tune the behavior of the component.
Exposing more options
Not every component includes more options. If one does, it has a cog icon to the right of each property section header that includes more options. Click this cog icon to expose more options for that property section. For example, the Light component’s General section includes more options:
When you click the cog icon, Unity exposes more options for the General section. In this example, the Light Layer property appears: