Changes may be coming to senior centers across the state in order to boost participation, and area agencies on aging like Legacy Link want to hear from residents about what those changes should be. Legacy Link, the agency serving Hall and 12 other counties, is holding a public meeting 9:30 a.m.-12:30 p.m. Tuesday at its offices at 4080 Mundy Mill Road, Oakwood. “Basically what they’re looking at is increasing the daily average attendance at the centers” from 20 to 30, said Lamar Gailey, community programs manager, of state objectives.