Disc-integrated profiles of the Fe i line at 617.3 nm without rotation (left) and with υ_rot sini = 7.5 km s^-1 (differential, α = 0.2, i = 60°; right) for G2V simulations. The grey line represents the profile of the non-magnetic run (hydro.), the blue curve is the profile of the 500 G run, the red curve is calculated using the thermodynamic structure of the 500 G run but assuming B ≡ 0 G for the line calculation (see text for further explanation). Dashed curves give the bisectors of the profiles with λ−λ_c values magnified by a factor of 5 for clarity. We note the different scales of ordinate and abscissa.