Several cases of magnetto-thermal transport properties in high critical temperature uperconductors are discussed, i.e. the longitudinal thermoelectric power in a magnetic field, the Nernst effect, the electrothermal conductivity and the magneto-thermal conductivity. It is shown that the order parameter type (or symmetry) can be well distinguished because of the difference in vortex features, e.g. in an s-wave or d-wave superconductor. The field dependence serves as the best recognizable signature even in polycrystalline samples. All that is highly consistent with considerations on intra-or intergrain processes, impurity effects, weak links and sample finite size.
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