HP Deskjet 5850 Color Inkjet Printer - Manual (Page 171)

If your software program includes a banner printing feature, follow
the instructions provided with the software program. Otherwise,
follow the instructions below.
1. Open the Printer Properties dialog box, then select the following:
tab setting
Paper/
Quality
Size is: Letter or A4
Source is: Upper Tray
Type is: hp banner paper
2. Select any other desired print settings , then click OK .