This topic has been posted before, however it is now closed, and the link to upvote the feature no longer works.
My main interest with Lightburn is copying/tracing parts from plans and cutting them out, in a similar way to the original poster’s requirement to cut out jigsaw puzzle pieces. The current trace feature, though amazingly powerful, doesn’t work for me (or the original poster) as it produces two lines around the border of each shape. I need one line down the middle of each border. Or down one side of the border. If there was a way I could easily delete one of the borders created that would work for me too.
The response from Lightburn developers indicates that this feature is on their todo list, so I’m hopeful it will appear one day. In the meantime may I recommend that a topic for feature requests be created? This would be valuable feedback for the developers as well as providing users with the opportunity and encouragement to make suggestions, and avoid duplication of suggestions.
Kudos to the developers for building such a fantastic tool. It can only get better!