Epson Stylus Pro 4000 Reference Manual page 263

4. Press the Paper Source
Now the printer is ready to print. While the printer is printing, do
not open the top cover. If the top cover is opened while printing,
the printer stops printing, and then restarts printing when the top
cover is closed. Stopping and restarting printing may reduce the
print quality.
button to select Sheet
Paper Handling
.
5
5
5
5
5
5
5
5
5
5
5
5
263