HP Color LaserJet 8550 Multifunction Printer series - Manual (Page 110)

110 Chapter 3 Common copying tasks
EN
Using 1
̈
2-SIDED mode
In this mode, you can create double-sided copies from single-sided
originals.
Figure 22 Create a double-sided copy from two single-sided originals
Note Make sure to place the original horizontally when making copies of
originals with a horizontal orientation (Letter-R or A4-R). If the original
is placed vertically, the front and back of the copy will be copied
upside down.
Single- to double-sided copies can be made only one at time.
Originals Copy