HP Officejet 350 All-in-One Printer - Manual (Page 36)

Remote Service
If you've contacted a Hewlett-Packard service representative about a
problem, you may be asked to turn the remote service setting On by
clicking the checkbox. The factory setting is
Remote Service=Off .
Reset it to Off after the problem has been diagnosed.
Changing the Loaded Paper Size
Use OfficeJet Setup/Loaded Paper Size to change the size of the paper
in the lower paper tray. The table below shows the paper sizes that
you can use for each HP OfficeJet function.
Task Valid Paper Sizes
Printing Letter, Legal, A4, Exec, Envelope
Faxing Letter, Legal, A4
Copying Letter, Legal, A4
Letter: 8.5 x 11 inches (216 x 279 mm)
Legal: 8.5 x 14 inches (216 x 356 mm)
A4: 8.27 x 11.7 inches (210 x 297 mm)
Exec: 7.25 x 10.5 inches (184 x 267 mm)
Envelope: Either (1) U.S. No. 10 envelopes, 4.12 x 9.5 inches (105 x
241 mm), or (2) European DL envelopes, 8.66 x 4.33 inches (220 x
110 mm)