An example printing apparatus in accordance with the present disclosure may comprise a platen (10) on which print media may advance and which may comprise a hole (20) that is open towards a print media advance surface and in fluid communication with a vacuum source (40) and with a pressure sensor (50). In implementations of the apparatus a control unit (60) may detect the presence of print media at the hole (20) if the pressure sensor (50) measures an air pressure below a predetermined threshold.