Compatibility relationships are tendencies, not universal behaviors. There are always some people who will not follow the relationship. Some compatibility relationships are strong and most people will follow them, whereas others are not as strong. In some design situations, more than one compatibility relationship may be involved and a solution may require violating one of the relationships. Use of labels will help those who may not follow the majority in applying a compatibility relationship when operating a control. Table 33-5 lists several compatibility relationships.