Left and right panels show the magnitude distribution of the LBG candidates selected with the modified O04 and Y06 selection criteria, respectively, in each band. The r-band magnitude distributions only show the LBG candidates that are brighter than the 1σ limit. The three vertical lines are the 3σ magnitude limit for the i-band (brown) and z-band (purple) and the 1σ magnitude limit for the r-band (grey).