Unity Render Pipelines components expose standard properties by default that are suitable for most use-cases. However, there are components and Volume Overrides that include advanced properties which you can use to fine-tune the behavior of the component.
There is a global state per user that stores if Unity displays advanced properties or not.
Not every component or Volume Override includes advanced properties. If one does, it has a contextual menu to the right of each property section header that includes additional properties. To expose advanced properties for that section, open the contextual menu and click Advanced Properties.
For an example, see the Water Surface component in High Definition Render Pipeline (HDRP).
By default only standard properties are shown.
When you select Advanced Properties:
Advanced Properties become visible:
For Volume Overrides, the already existing contextual menu has a Advanced Properties toggle as well.
You can also access to this global preference by: