Epson Stylus Pro 7800 User Manual page 216

When the same data is printed with a 3 mm margin and a 15 mm
margin and compared, you may notice that part of the right side
of the 15 mm margin image is not printed.
Area to be
Clipped
15 mm
Right
PAPER SIZE CHECK
Select ON to check the width of paper loaded in the printer to match
the data width. When you select OFF, the printer may print beyond
the width of paper even if the paper width does not match the
data. We recommend you select ON.
PAPER SKEW CHECK
When you select ON, if the paper is not straight, PAPER SKEW
appears on the LCD and the printer stops printing. When you
select OFF, a paper align error does not occur even if the printed
data is out of range of the paper, and the printer continues to print.
TIME OUT
The setting range is 30 to 300 seconds. If the cable of your printer
is unplugged or your printer hangs up for more than the set time
range, the print job is cancelled and the printer starts paper feed.
216
The Control Panel
Printable area
Leading edge
Bottom
15 mm
Roll paper
Top
Print direction
15 mm
15 mm
Left