I do not know which version of Unreal Editor is described in the documentation but some parts are not in line with version 4.26.1.
I see e.g. such sentence:
The first 3 equal the Low , Medium , High , Epic settings in the View → Scalability Options → AA settings.
- Path should be: Settings → Engine Scalability Settings → Anti-Aliasing
- There is additional quality level - Cinematic
Some of the other scalability groups are also affected.