Make it easier to follow a line in a whiteboard

What is the challenge?

If you add a lot of lines to a whiteboard they can be hard to follow.

What is the impact?

This can make whiteboards confusing and hard to use.

Describe your idea

If you click a line it would highlight the line and make it standout from other lines. Ideally it would start to highlight where the line begins and then track the line to the end point. This would make it easier to follow a line in a whiteboard.