You want to laod paper use these steps so first of all open a front cover of printer.
Side out the cassette unit you hear a click.
Open a paper guides by sliding the right paper guide to the edge .
Now lets load the paper on your printer.
Load A4 or letter size paper with the printing side facing down .
Take care not to load the paper past the limit mark on the paper guide.
Align the paper guides with the edges of the paper.
Insert the paper with the printing size facing down, until its touches the far end .
Don't load the paper in landscape orientation or the paper might jam .
Slide the cassette unit you hear a click .
Paper information register screen appears.
Use the right or left arrow to match the paper size and type pressing OK after each selection .
Slide out the paper output support .
Then open the output tray extension .
The paper loading is now complete .