Spectral profiles of 55 Cnc FUV lines. Each row corresponds to a stellar line, ordered from top to bottom by decreasing formation temperature (Table 1). First to third columns correspond to visits A_fuv, B_fuv, and C_fuv, respectively. Black profiles with error bars are the spectra taken as reference for the quiescent stellar lines, built by coadding stable spectra in each visit. Colored profiles correspond to spectra showing significant deviations from these references (exposures 0 to 4 in blue, cyan, green, orange, and red, respectively). All stellar lines have been corrected for their measured spectral shift and are thus centered on their rest wavelength (vertical dashed line).