Sets the current justification mode- how the signature is sized and positioned in the signature box as well as when using the WriteImageFile method.
JustifyMode-Justification mode, 0-normal no justification, 1-justify and zoom signature (upper left corner) 2-justify and zoom signature (upper right corner) 3-justify and zoom signature (lower left corner) 4-justify and zoom signature (lower right corner) 5-justify and zoom signature (center of control).