Parameters obtained from fitting full line profiles at various spectral resolutions in different stars. Top rows: fitted line widths for one weak and one strong line at different stellar disk positions. Bottom rows: corresponding wavelength shifts. The values were obtained from fitting five-parameter Gaussian-type functions to the line profiles. Black stars denote values for integrated full-disk flux from 3D models at full hyper-high spectral resolution. Solid curves with blue symbols denote λ∕Δλ = 300 000, dashed lineswith green symbols show 150 000, and dotted curves with red symbols plot the lowest resolution of 75 000.