How to adjust paper guides
Length guides
There are two main guides and one auxiliary guide as shown below to adjust for the paper length. One of main guide is for legal, A4, or folio size, and the other is for letter (LTR), executive (EXEC), or B5 size paper. When you load letter size paper, it is recommended that you use the auxiliary guide on the upper right corner of the cassette with the appropriate main guide.
Use for A4, legal, Folio size paper
Use for letter, executive,
B5 size paper
Auxiliary guide for 
letter size paper
To adjust for legal, or folio size paper, pinch the right guide, then slide the guide until it lightly rests against the edge of the paper stack.
To adjust for letter (LTR), executive (EXEC), JIS B5, or ISO B5 size paper, squeeze the left guide and slide it until it lightly rests against the paper stack.
