Note: if you use '{{'ui.options.graphics.displayMode.window'|translate}}' mode with a Nvidia gpu, and 'G-Sync for windowed mode' is enabled in Nvidia Control Panel, the framerate can decrease significantly.
Anti-Aliasing will clean up jagged lines from the image, with a minimal performance cost. SMAA is recommended over the more blurry FXAA mode. SMAA is recommended.