Epson EPL-N7000 Reference Manual page 38

6. Insert the paper size detector at the location of the desired
paper size. Push the paper size detector to the left, and then
push down the gray stopper to secure the detector, as shown
below.
Note:
In the illustration above, the paper size detector is inserted at the
location for A4 size.
7. Fan a stack of paper and tap it on a flat surface to even the
edges. Then load it into the paper cassette with the printable
surface facing up.
Paper Handling
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