A compound saawtooth consists of a subordinate relaxation followed by a main relaxation; it has approximately twice the period and the amplitude of a normal sawtooth. High resolution 2-D images, produced by the soft X-ray tomography system of the Tokamak de Varennes, are used to compare the different types of sawtooth relaxations. It appears that a reconnection process is involved for all collapses, although the reconnection is incomplete during the partial relaxation.