A printing apparatus is provided. The printing apparatus includes a first medium holder and a second medium holder, at least one print head, at least one print head drive unit, at least two holder drive units, at least one ink cartridge, and a cooperation controlling system to control printing operations in the printing apparatus. The printing operations include a first printing operation, a first pre-print operation, a first after-print operation, a second printing operation, a second pre-print operation, and a second after-print operation. One of redundant behaviors included in the first after-print operation and the second pre-print operation is omitted by the cooperation controlling system when the second printing operation is conducted successively to the first printing operation.