In graphic arts camera apparatus, a copyboard mounted on a frame for tiltable movement and having a cover section hinged to a base section and releasable latch for fastening the sections together is characterized by a latch actuator for automatically releasing the latch to permit separation of the hinged sections whenever the copyboard tilts from a vertical exposing position to a horizontal loading and unloading position. A catch mechanism prevents inadvertent release of the latch when the copyboard is vertically disposed, and the latch is biased toward a latched position to facilitate fastening the sections subsequent to loading the copyboard.