A controlling apparatus for controlling a printer includes at least one memory storing instructions and at least one processor. The processor executes the instructions to receive a print job, and determine whether there is a difference between a first conveying mechanism that has been used for a first print job received and a second conveying mechanism that is to be used for a second print job received after the first print job. The instructions are also executed to, according to the determination that there is a difference between the first conveying mechanism and the second conveying mechanism, perform an inspection process based on a result of reading a print medium that has been conveyed using the second conveying mechanism, after a printing operation of the first print job.