If papers you have set by [User Settings] - [Printer Settings] - [Paper Setting] - [Paper Size] are not loaded into the paper tray, you can specify whether or not to print on paper of a similar size.
In normal circumstances, select [OFF]. When you select [ON], size conversion between A4 and Letter and between A3 and Ledger automatically occurs and images may be partially lost.
[OFF] is specified by default.