Change Clors of Line to Different Colors????

 
How do I change the color of the trend lines and support lines. Currently they are all red but I want each one to have a specific color (slanted line, horizontal line, vertical line, check marks).
 
How do I change the color of the trend lines and support lines. Currently they are all red but I want each one to have a specific color (slanted line, horizontal line, vertical line, check marks).

Try to point with cursor on the line, left click to select it and than right click to get property menu. Select your color.
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