Feeds out a printed sheet by folding it in three. Also select the unit by which the paper is folded from [By Copy Job (Multiple Sheets)], [1 Unit], and [By Page]. When you set [By Page], specify the number of pages to be folded at one time.
Tips
To use the Tri-Fold function:
The Finisher FS-534 and Saddle Stitcher SD-511 are required.
The Finisher FS-535 and Saddle Stitcher SD-512 are required (only for bizhub C554).