Synthesised line profiles and velocity distributions at time t = 50 s. Top row: profiles of the Fe XII line at 193 Å with the peak intensity normalised to unity plotted as a function of Doppler velocity (black). These are for field-of-views of different sizes as indicated above the panels and illustrated in Fig. 1b. Bottom: histograms of LOS velocities (v_y) at voxels within the corresponding viewing window (black). The red lines show single Gaussian fits to the respective profiles. The numbers in red in the top left of each panel indicate the width of each Gaussian fit (Gaussian width equal to half width at 1/e of line peak). The percentages in blue in the top right show the emission of the actual profile (in black) in excess of the single Gaussian fit (in red). The green profiles show a fit to the line profile or velocity distribution by a kappa function.