Time evolution of the galaxy Au7 seen edge on. Surface brightness is shown in the left column, total metallicity [M/H] in the middle column, and [Mg/Fe] abundance in the right column. From top to bottom, the stellar component is shown for seven different snapshots. On top of the middle panels, the redshift and the look-back time (LBT) corresponding to the snapshot shown in that row are indicated. For comparison, horizontal dashed lines separate the regions where the thin or the thick disks dominate at z = 0, while the vertical lines indicate the region where the central component (bar or classical bulge) dominates at z = 0.