Select regression fit > Editor > Edit Regression Fit > Attributes
Use to change the attributes of the fitted line on a scatterplot or matrix plot. To add a regression fit to a graph, choose Editor > Add > Regression Fit.
Lines
Automatic: Choose to accept the default line attributes.
Custom: Choose to customize the line attributes.
Type: Choose a line type.
Color: Choose a line color.
Size: Choose a line width.