Examples of particle tracks in the Metis VL instrument cosmic-ray matrices gathered in 2023. Left panel: outcomes of a viewer, not expressly dedicated to the analysis of Metis cosmic-ray matrices, for oblique and straight stracks (top figure), squares (middle figure) and slant track with several extra pixels possibly fired by secondary particles generated in the sensitive part of the detector (bottom figure). Right panel: same tracks reported in the left panel, but displayed with the APViewer developed specifically for the visual analysis of the Metis cosmic-ray matrices.