Epson Stylus Pro 7450 User Manual page 220

7. Press the Paper Feed d button to feed the paper forward and
create a loop of slack.
8. Move and hold the Manual switch on the Auto Take-up Reel
Unit to the Forward position, and take up at least one turn of
paper on the take-up reel core. Make sure that adequate slack
remains between the roll paper and the take-up reel core.
Paper Handling
220