Center-to-limb changes of overall parameters for differently strong lines computed from the various CO ⁵BOLD models representing stars of spectral types F, G, and K. Properties of strong lines are shown by solid curves, of intermediate lines by long-dashed, and of weak lines by short-dashed curves. Line-width measures, line-center intensities, and convective line shifts are from symmetric Gaussian fits to the full synthetic profiles and therefore do not resolve any line asymmetries. Convective line shifts are in absolute units but gravitational redshifts are neglected.