Platen mountable on a printer

A platen configured to be mounted on a printer configured to eject ink onto a medium, the platen being configured to define a contact surface which is a medium placement surface when the platen is mounted on the printer, the platen comprising:

• a first member having a first surface;
• and
• a second member having a second surface,
• wherein the first member comprises a plate having the first surface,
• wherein a state of the platen is switchable between:
• a first state in which the contact surface is formed by the first surface and the second surface such that a size of the contact surface is a first area;
• and
• a second state in which the contact surface is formed by the first surface such that a size of the contact surface is a second area smaller than the first area,
• wherein in the first state, the first surface and the second surface form the contact surface inside an outer edge of the plate in a direction in which the first surface extends,
• wherein in the second state, the first surface forms the contact surface inside the outer edge of the plate and the second surface does not form the contact surface, and
• wherein the state of the platen is in the first state when the ink is ejected onto the medium, and the state of the platen is switched from the first state to the second state after the ink ejected onto the medium.