Example of how crossings of the SFMS are detected. We show the position relative to the SFMS in dex of two galaxies with similar masses but very different numbers of crossings, obtained by subtracting the value of the SFMS at each age from the SFR at each age. The age bins where a crossing is detected (i.e., the previous age bin has the opposite sign for Δlog SFR) are indicated with a dot.