How to add a message shows up in all threads to vistors and not to users?

[thermax04]

Dear Lynn
Thank you for your support
I also said that I tried the code for both guest and member
So, I used the code:
<vb:if condition="!$show['member']">message</vb:if>
and as you said : !$show['member'] means don't show to members
Here in the picture you will see that Iam not logged in (orange rectangle), and there is no message shows inside the thread, I want the message to be shows in any of the 2 red rectangles in the picture