[NTG-context] Red framed text

[Hans Hagen]

David Arnold wrote:

> Very cool. First time I ever could figure out what \relax does. When  
> I deleted it from this source, I got:
>
> ! I can't find file `zapf}'.
> l.25  {\input zapf}
>
> Please type another input file name:
>
> Good learning experience for me. I've seen and ignored this type of  
> error message before, looking elsewhere in the code. A very good  
> heads up for me.
>
> Now is there anyway I can visualize the importance of the line
>
>    setbounds currentpicture to OverlayBox ;
>
> in this example? I deleted it and recompiled but didn't see much  
> difference. What is the import of this line?

take a bigger pen ... since the background is bigger than the overlaybox 
it will get centered in the background which si not what you want, 
therefore the bounding

Hans