We have provided supplementary material to our article titled “Estimating the nature and the horizontal and vertical positions of 3D magnetic sources using Euler deconvolution” and whose authors are Felipe F. Melo, Valeria C. F. Barbosa, Leonardo Uieda, Vanderlei C. Oliveira Jr, and João B. C. Silva. In this material, we presented an extra synthetic test to illustrate the steps of our methodology didactically. Additionally, we illustrated with synthetic test the ability of our method to correctly estimate the source positions when it is applied to a reduced area that does not cover the anomalies entirely.