Normalised Stokes I and V profiles of FK Aqr in the observational period 3–16 September 2014. Observed profiles are plotted in dashed black lines, synthetic profiles are in red lines, and blue horizontal dashed lines are the zero level. All profiles are shifted vertically for display purposes. The rotational phases of the observations are indicated in the right part of the plot next to each profile. The vertical violet (for the primary) and green (for the secondary) dashed lines in the Stokes V panel indicate the center of the line profiles.