This feature copies originals in different sizes at the same time even when 81/2" x 14" (B4) size originals are mixed with 11" x 17" (A3) size originals.
When scanning the originals, the machine automatically detects the size of each original and uses paper appropriate for that size.
When mixed size original is combined with auto ratio selection, the ratio is adjusted individually for each original according to the selected paper size, enabling printing on a uniform paper size.
When mixed size original is combined with auto ratio selection
(Auto ratio selection and 11" x 17" (A3) are selected)
There are two settings for mixed size originals.
Same Width 
Different Width 
Use this setting for originals that are different sizes but have sides that are the same length.
The originals are inserted in the document feeder tray with the sides that are the same length aligned together on the left.
 11" x 17" and 81/2" x 11"
 81/2" x 14" and 81/2" x 11"R
 81/2" x 14" and 51/2" x 81/2"
 81/2" x 13" and 81/2" x 11"R
 81/2" x 13" and 51/2" x 81/2"
 81/2" x 11"R and 51/2" x 81/2"
 A3 and A4
 B4 and B5
 A4R and A5

Use this setting when the originals are different sizes and do not have sides that are the same length.
This setting can only be used for the following combinations of sizes:
 11" x 17" and 81/2" x 14"
 11" x 17" and 81/2" x 13"
 11" x 17" and 51/2" x 81/2"
 A3 and B4
 A3 and B5
 B4 and A4
 A4 and B5
 B4 and A4R
 B4 and A5
 B5 and A4R
 B5 and A5

Mixed Size Original must be specified before scanning the original.
 When [Different Width] is selected on the MX4111N/5111N, "2Sided to 2Sided"
and "2Sided to 1Sided" of automatic twosided copying can be used.
 When [Different Width] is selected, the staple function cannot be used.
 The mixed size original function cannot be used to copy originals
that are the same size but are placed in different orientations
(81/2" x 11" and 81/2" x 11"R (A4 and A4R), etc.).
[System Settings] in "Setting mode" → [Device Control] → [Original Feeding Mode]
Select this setting to always scan mixedsize originals.