NorthStar 958 Operator's Manual page 32

Chapter 2 - Introducing the 958
Page 24
Question windows
A question window appears when the 958 needs a response
from you. You must respond to any question window by
pressing the ENTER key to answer yes, or the CLEAR key to
answer no. Most of the other keys, including the function keys
as well as the video image display, are temporarily inactive
while the 958 displays a question window.
958 Operator's Manual, Rev. A