See this forum post: https://forum.processing.org/topic/controlp5-annotations-24-8-2012#25080000001728263

I've tested this with Processing 2.0 and the newest version (2.0.4) and it works now. However the dropdown boxes don't inherit the position set with the setPosition command.

Example: cp5.setPosition(10, 270, ef1);

The dropdown boxes stay at their absolute position (in stead of moving to 10, 270 and relative to that). See screenshot: