Toshiba e-Studio2500c Operator's Manual page 113

When a standard size paper other than A3, A4, B4 and B5 is set
Register the size of the placed paper to the [OTHER] button with the following procedure. The
registered paper size is automatically selected when the [OTHER] button is pressed.
1
Press the [OTHER SIZE] button.
2
Press the paper size button corresponding to the paper that has
been set.
E.g.: When FOLIO-size paper is set
3
Press the [OTHER] button.
Enlargement and Reduction Copying 111