The classic Burmester problem aims at finding the geometric parameters of a planar four-bar linkage for a prescribed set of finitely separated poses. In this paper, we introduce a Matlab-based graphical user interface to support the solution of the classic Burmester problem. The synthesis deals with both revolute-revolute (RR) and prismatic-revolute (PR) dyads for a prescribed set of five poses. Issues such as numerical conditioning, multiplicity of solutions and singularities are considered. A case study shows the applicability and robustness of the numerical procedure in a design environment.