Changing line with

Lasers
1

I have a sculpfun 9
how do I change the width of the line

2

If I interpret your question correctly, there are two possibilities.
One is that you defocus your laser, the other is that you do something called offset, where you “copy” your original line with a given distance x times.
If you use LightBurn there is a built-in function for exactly this desire.