I've played around with the custom workplace but I'm not sure how it all works.
I think its so you can move parts around like the library, elements and timeline panels. But not sure if you can customise the font size etc.
Have a look at those links see if they are helpful
thanks for the useful link - based on this I decided to
purchase the PDF of Adobe Edge Animate: The Missing Manual
by Chris Grover. Good book indeed, work space panels resizing
and docking are covered, but there is nothing on colors&fonts...
I've been searching intro's, tut's, forums on Edge, but no hint
on this... But I keep searching You Tube, Google, etc...
I'm intended to submit the subject to Adobe Edge Support.
Thanks again for Your attention