Epson Stylus Pro 4000 Reference Manual page 242

7. Hold the both sides of the paper, and load the paper into the
paper insertion slot. Pull the paper until it hangs down over
the paper tray.
Note:
If you load thin paper, press the Paper Feed button
the value of paper suction. If you load thick and curled paper, press
the Paper Feed button
8. Hold the both fixed and movable flanges, and rewind the
paper to the line marked with A4/B4.
242
Paper Handling
to increase the value of paper suction.
to decrease