The design community came out in force Wednesday for a trio of celebrations at the Boston Design Center. Interior decorator Tom Scheerer, who has transformed many a New England manse and summer home, signed copies of his new book, “Tom Scheerer Decorates.” The designer said he hadn’t been to Boston since 1975, when he studied for a year at Boston University before moving to New York to study architecture and where he is still based. Scheerer — dapper in a khaki trachten jacket (think Captain von Trapp) with a purple bandana pocket square — designs with a nod to his environs, and embraces New England-ness wholeheartedly. “I love a Windsor chair. I love Currier and Ives. It’s true wherever I work that I’m always referential,” he said. Scheerer’s appearance here was prompted, in part, by the opening of Quadrille, the newest showroom at BDC, and the launch of the design center’s ID Boston magazine. On hand to fete Scheerer were John Knott, owner of Quadrille, and Chesie Breen, editor in chief of ID Boston.