Kyocera TASKalfa 306ci Operation Manual page 221

Using Various Functions > Functions
Original Orientation and Staple Position
Original
NOTE
Two position staple is not available for long edge paper orientation.
Two position staple is not available for B5 paper.
Mixed Size Stapling
Even with mixed paper sizes, if the sizes have the same width, the output can be stapled. The size of sheets that can be
stapled together is Letter and Legal. Up to 30 sheets can be stapled.
NOTE
When performing Mixed Size Stapling, refer to the following:
Mixed Size Originals (page 6-12)
Image
Print results
Original Orientation
Top Edge on
Top
Top Edge on
Left
6-14