The time evolution of the stellar disk density (left) and metallicity (right) profiles for the dwarf Sa isolated GalMer model. Time outputs and colors are the same as the third row of Fig. 1. This is a low-mass galaxy with a rotation curve of  ~100 km s^-1 similar to NGC 300 and M 33. The initial disk scale-length is indicated by the dashed line. The disk extends to over ten scale-lengths in less than 3 Gyr.