Herb and Dorothy Vogel, a retired postal clerk and librarian, collected thousands of pieces of modern art and stored them in their Manhattan apartment before they decided to give them away to museums around the country. One curator calls it an "institution changing" gift in Herb and Dorothy 50X50, a documentary about the couple's tremendous collection. The film shows at 7 tonight and at 1:30 p.m. on Sunday at the Cleveland Museum of Art. Tickets are $9. (Niesel)