
Originally Posted by
gamary
It's not working because your lines are black (colour adjustment does not work on black or white stuff). Try this:
1 - Duplicate your black lines layer.
2 - On the new layer, open the "curbs" dialog (Ctrl-M)(sorry, my PS is in French so I don't know the exact English term). Select "Red" from the pull-down menu. Now type 256 in the "output" field and click OK. This should have changed your lines into pure red.
From there on, you can use the color replacement menu and do what you want. I hope this helps.