Canon imagePROGRAF TA-20 MFP 24" Large Format Printer with L24ei Scanner and Stand Kit - Manual (Page 186)

A. Output object area
B. 200% post-processing size
ENLARGE/REDUCE Fit paper size SETTING EXAMPLE
Fit paper size expands or reduces the long side of the print data's output object area so it matches the
long side of the output page size output object area. The origin is in the upper-left corner.
Margin widths are not enlarged or reduced. Because of this, paper size scaling and post-processing
image scaling may not be the same.
For example, doubling the length and width of A4 size paper results in A2 size paper.
If there are margins of 3 mm, the A4 size output object area measures 291 mm x 204 mm.
Specifying Fit paper size will result in a post-processing size of approximately 588 mm x 412 mm.
(Note that ambient conditions may cause paper to expand and contract.)
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