There is a drop-down selection allowing you to choose one of the available cut settings options. You can also double-click the layer color to expose the details ‘Cut Settings Editor’ window. In LightBurn we use the following terms: cut/mark=Line, scan/engrave=Fill, scan with cut line=Fill+Line
If you haven’t already, here is a good place to start a walkthrough of LightBurn. More videos on Youtube as well.