Enlarged view around the anomaly region in the lensing light curve of KMT-2019-BLG-0414. Drawn over the data points are the 1L1S model considering finite-source effects (FSPL), the two 2L1S (solutions 1 and 2) models, and the binary-source model considering xallarap effects (xallarap). The model curves of the two 2L1S models are difficult to be resolved within the line width due to the severe degeneracy between the models. The four bottom panels show the residuals from the individual models. The two left insets in the top panel show the lens-system configurations of the two 2L1S solutions, and the right inset shows the configuration of the xallarap model. The blue and red curves in the bottom panel represent the differences of the 2L1S solutions 1 and 2 from the FSPL model, respectively.