Residuals between the synthetic photometry from Gaia BP/RP spectra and J-PLUS photometry in the r band as a function of the G magnitude (left panels) and the G_BP − G_RP color (right panels) before applying the transformation terms (top panels) and after applying them (bottom panels). The color scale depicts the number density of sources using a logarithm scale, and nearly 1.5 million sources are shown. In all panels, the solid red line represents the median of the residuals, and the dashed lines show its one σ dispersion.