How do I load envelopes into the HP Color LaserJet Pro MFP M477?

Load envelopes face up in both Tray 1 and Tray 2, with the short, postage end leading into the printer. For best performance, load only 4 to 6 envelopes (up to 5 mm) in Tray 1, and no more than 10 envelopes in Tray 2. When printing, select 'Envelope' as the paper type and the correct envelope size in the print driver's Paper/Quality tab. (Pages 23-24)