Half-Fold Position Adj.: Adjusting the Half-Folded Position
Adjust the half-fold position determined by Folding Unit FD-503 by changing the length across the top of the printed paper.
Objects of Adjustment: Offset for All Size, A3 
, B4 , SRA4 , A4 , 12 
18 , 11 17 , 8.5 14 , 8.5 11 , 8K , Custom (380 to 458 mm), Custom (279 to 379 mm)
If a numeric value is specified for [Offset for All Size], it is applied to all paper sizes. With a specific paper size selected,the set value becomes the sum of the entered value and the value previously specified for [Offset for All Size].
Press [Adjustment] on the [MACHINE] screen to display the [Adjustment Menu] screen.
Press [Finisher Adjustment], [Multi Folder Adjustment], [Multi Folder (Fold) Adj.], and [Half-Fold Position Adj.] in sequence.
Select the size to be adjusted using [
] or [
]. 
Press [Print Mode].
Load the paper with the size to be adjusted, then select that tray.
Press Start on the control panel.
A sample pattern will be output.
Check the misalignment (a) of the edges of printed paper.
Allowance: a = 0 mm ± 1.5 mm
If any adjustment is required, press [Exit PrintMode] to return to the [Half-Fold Position Adjustment] screen.
Use the touch panel keypad to enter the set value.
Use [+/-] to specify the value to be positive or negative.
Press [Set] to change the current value.
Adjustment Range: -50 ([To shorten the top face]) to +50 ([To lengthen the top face]) (1 step = 0.1 mm)
Repeat steps 4 to 9 until the desired result is obtained.
Press [Return].
The screen returns to the [Multi Folder (Fold) Adjustment Menu] screen.