HP Deskjet 5850 Color Inkjet Printer - Manual (Page 155)

For instructions on loading the 250-Sheet Plain Paper Tray Accessory, click here .
If the 250-Sheet Plain Paper Tray Accessory is not included with
your printer, it may be purchased separately from an authorized HP
dealer. The accessory is not available in all countries/regions.
printing
1. Open the Printer Properties dialog box, then select the following:
tab setting
Paper/
Quality
Size is: Appropriate paper size
Source is:
Upper Tray
Type is: Automatic or Plain Paper
If you have the 250-Sheet Plain Paper Tray Accessory
installed, choose
Lower Tray in Source is, and choose Plain
Paper in Type is.
2. Select any other desired print settings , then click OK .