New members of boards of visitors were advised Tuesday that they work “in a crowded sandbox” that requires them to be supportive of their president and respectful of faculty. While the board may make the final call, “there are others who play in there with you,” Richard D. Legon, president of the Association of Governing Boards of Universities and Colleges, said. Legon was among the speakers at an annual orientation for members of governing boards that was made mandatory this year as a result of the 2012 leadership crisis at the University of Virginia.