Heat maps to demonstrate how the observation (top row) and simulation (bottom row) networks detect an example merging EAGLE system. Panels a and d: original image of the galaxy being classified. Panels b and e: regions that most effect the merger classification and panels c and f: heat maps where regions with darker colours have a greater affect on the classification (lower merger class output). Panels b and e are created by stretching the heat map between zero and one and multiplying this with the original image.