"You may click" vs. "Click"

[Peggy Thompson <Peggy_Thompson -at- CCMAIL -dot- OSTI -dot- GOV>]

 When writing instructional materials, I assume all of you write
 in the second person: "At the prompt, type blah blah blah..."

 But do you ever write, "At the prompt, YOU MAY type blah blah to
 access the system"?

 I never add the "you may's." But an editor friend of mine said
 this has become a BIG issue in her office; she wondered what
 others are doing.