User Activity

I have a MF731C on a home WiFi network. When getting rid of the machine should I clear any memory or network settings? If so, how would I do that?
I downloaded the firmware update file. When I launch installer it appears it needs to do installation over either USB or ethernet cable. My printer is wirelessly connected. Can you please clarify the proper installation procedure?
I have an MF733Cdw.  Can anyone please explain how to print an envelope?  The manual is worthless.  It has numerous pages devoted to the proper way to load envelopes.  And exactly nothing about how to tell the printer it is printing an envelope.  I'v...