Images show the color-coded number densities of stacked galaxies for the SFR–M_* relation for the i < 26 sample in three redshift ranges from [0.2, 0.5], [0.5, 0.8] to [0.8, 1.1] (from the top to the bottom) and in three different stacks, including “Groups + Field” (left), the field (middle), and group galaxies (right), respectively, where “Groups + Field” consists of the contaminated group sample including group and field galaxies. The color scale in the color-bar is proportional to the number counts in each cell normalized by the cell with the maximum count. The diagonal lines represent the boundaries to separating star-forming and quiescent populations. They are sSFR = 10.1 in 0.2 < z < 0.5, 10.0 in 0.5 < z < 0.8, and 9.9 in 0.8 < z < 1.1. The white solid lines with error bars, estimated using the jack-knife resampling from eight sub-samples, denote the median values of SFRs at different stellar masses. In addition, the blue and red vertical lines denote the mass completeness limits for star-forming and quiescent galaxies at the upper (solid lines) and lower (dashed lines) redshift limits of each panel. We can qualitatively learn the redshift evolution of galaxies in two distinct environments (middle and right-hand columns), and at the same redshift, the differences of galaxy distributions in the SFR–M_* space in different environments to see the environmental impact. (Color online)