How do I make datum axes more visible?

[Thomas.McDougallEBCQ5]

Datum axes are tiny and almost impossible to see.  How can I resize/thicken them so they are less difficult to work with? 

Edit: For clarity I am referring to the axes/construction lines in the 3d modelling environment.  

[Gabriel_Watson]

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[Thomas.McDougallEBCQ5]

Sorry, I should have been more clear, I was referring to the axes/construction lines in the part/assembly modelling environment.  

[Gabriel_Watson · Accepted solution]

Similarly, open your Standard.idw from "New", and edit here:

Save changes to your style library then update in your part/assembly, as explained here:

https://knowledge.autodesk.com/support/inventor/troubleshooting/caas/sfdcarticles/sfdcarticles/How-t...

[Thomas.McDougallEBCQ5]

Thanks for your help!