The behaviour of paramagnetic resonance, in particular its width and shape, in the neighbourhood of a magnetic transition is calculated on the basis of a Green's function method. The calculation presented in our previous paper is re-examined and refined. New results are discussed in physical terms and compared with existing experimental data. A quantitative agreement is found in the case of MnF2 without any adjustable parameter. Temperature change of line shape is predicted for a large value of anisotropy.