How to adjust the diameter of lines

[slicer365 (HuoLeifeng)]

How to adjust the diameter of these three kinds of lines,

I want to make them thicker

[jamesobutler (James Butler)]

See the following thread which covered this topic

Slice Intersection Thickness

You need to dig into how to get the slice display nodes, but in most cases this for example will set the red slice intersection thickness to 5 points: getNode('vtkMRMLModelDisplayNode1').SetLineWidth(5)