05-28-2014, 01:11 PM
(Tested under Mac OS X 10.6.8)
An even better choice than the Help window is the Stickies app.
Create a new Stickies note.
In the Note menu toggle on "Floating Window".
This new note will stay on top of (and obscure) any window in any app.
Unlike the Help window, you can make the Stickies window blank (or say whatever you like).
You can make the color gray to minimize the distraction of the overlay.
An even better choice than the Help window is the Stickies app.
Create a new Stickies note.
In the Note menu toggle on "Floating Window".
This new note will stay on top of (and obscure) any window in any app.
Unlike the Help window, you can make the Stickies window blank (or say whatever you like).
You can make the color gray to minimize the distraction of the overlay.