User testing - results

Seven people responded to the survey
Everyone liked the interface in principle

But there were many suggestions for improvements:
Text and change markers look too similar
use icons for change markers? 
separator lines?
different background colors?

"C" isn't as mnemonic as expected (use "!")

Change markers float in space next to the line
Text shifts horizontally - bad

Inadequate navigation through text
Up and down arrows don't do anything, but left and right do - confusing