Target galaxies No. 7, J100712.21+065735.6 (left pair) and No. 3, J025325.28-001356.6 (right pair). The left image in each pair shows the colour distribution based on the ratio between the fluxes in the B and Hα -continua, index B-EMMI768. Blue/dark regions map young stars and red/light-grey regions map old stars. The image on the right in each pair shows a map of EW(Hα), ranging between 0 and 200 Å in the galaxy on the left and between 0 and 600 Å in the galaxy to the right (white regions are higher values). Blue/dark regions have low equivalent widths, red/light-grey have high equivalent widths. The images have been selectively (depending on the local S/N) filtered with a median boxcar filter, using the MIDAS task filter/smooth. North is up, east is to the left. The fieldsizes are 24′′ × 26′′ and 36′′ × 48′′ respectively (online version in colour).