In a terminal server environment where GP is deployed as a remote app, and users have dual monitors, the notes window may be hidden. Someone may have launched the notes window and moved between monitors or sized it differently within their session. GP or Windows is remembering the position and size. When another user is launching the notes window, it appears in a position that is hidden to them or off-screen. When this happens, press Alt + Spacebar + X. This will maximize the notes window allowing it to be resized and repositioned.