Which method to use
Each method has an Advanced antialiasing settings section. Restore this method’s settings puts that method back to its defaults. It does not appear for Off.
TAA

TAA with its advanced settings.
MSAA

MSAA with Samples per pixel and its advanced setting.
SMAA

SMAA with the SMAA view set to Detected edges.
Set SMAA view back to Final image when you finish comparing.
FXAA

FXAA with Search quality and its thresholds.
FSR 3 and DLSS / DLAA

FSR 3 with the Quality reconstruction profile.
Render scale (25 to 100%) is shown for every method and sets scene resolution directly. With FSR or DLSS you edit it only after choosing Custom. The interface and editor outlines always keep window resolution. FSR 3 has no frame-generation control here.
DLSS and DLAA need a supported NVIDIA GPU and an installation that includes NVIDIA DLSS. When they are not available, Method does not list them.
Troubleshooting
DLSS: …
DLSS: …
DLSS is not available here. Choose another method in Method; Off, SMAA and FXAA are always listed.
Couldn't apply: …
Couldn't apply: …
The setting was refused. Choose a different method or value.
