Restricting display to 1024*768 on wider screens,

[Kresten Bjerg]

Thanks to Jim for very impresive examples, not least the ballclock, which does illustrate a basic transparency.
The recommended "Window-lab" however does produce black masks, when I test it, I cant find the trick to create a window of  transparency in the center of a larger stack
. So I am still hoping for Klaus Majors  promised example, and/or other clarification 
Kresten