Hello everyone.
The screen (trajectory) of Mach4 is difficult to see, so if you know how to improve it, please let me know.
Thanking you in advance.

You can change the color and thickness of the lines.

Go to Operator then Edit Screen
Click on the window.
Under properties on the bottom left scroll down.
You see the colors abnd the line Widths.
Change if you want.
After a change go to Screen then Save Screen
Go to Operator and exit Edit Screen
Restart Mach

Answer Hello Mr.Bill_O.
I was able to edit the screen to my liking.
Thank you very much.