Evolution of the horizontal displacement of the n = 10 g mode of the evolutionary track containing the reference model. The colors and intensity indicate the sign and amplitude of the displacement. Since the oscillation equations are linear and homogeneous, the absolute magnitude and overall sign are not relevant. Around X_c = 0.56 the mode undergoes avoided crossings with the n = 11 and n = 9 modes, causing strong changes in the structure of the mode.