How to Position Shape based on display size

Processing Coding Questions
4
  1. I presume that you are running your code in Java mode.
  2. You should to be able to precisely locate objects where you want them. Maybe post the code and an image to show the result so that we can see the problem.
  3. The code that you posted above seems to work ok here in Java mode. I can see a white dot traversing a screen the width and height of my desktop monitor (1920x1080) and the x-coordinate being displayed below it.