AIA 94 and 171 Å images as well as a composite of both channels taken during the B6 flare on 7 June 2020 around 21:44 UT (top). Coloured boxes indicate the regions used for extracting the DEM curves shown in the bottom panels. Time evolution of the preflare subtracted DEM profiles averaged over the boxes shown in the maps in the top panels. Black curves show the corresponding preflare DEMs (bottom).