HP Deskjet 5850 Color Inkjet Printer - Manual (Page 173)

If your software program includes an iron-on transfer 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: Appropriate paper size
Source is:
Upper Tray
Type is: hp iron-on transfer
Print Quality: Normal or Best
Basics Orientation: Mirror Image
2. Select any other desired print settings , then click OK .