In one example in accordance with the present disclosure a system for preventing media misalignment during accumulation. The system includes a number of media clamps having multiple positions to prevent misalignment of an incoming media sheet during accumulation. The number of media clamps are in a raised position after a leading edge of the incoming media sheet has passed over a trailing edge of the stack region. The media clamps are in a clamped position after the leading edge of the incoming media sheet has passed the media clamp.