Hi fellows, does anybody know, if you can lengthen the line of a linear fit in the control settings (besides drawing a line with the line tool)? Thanks
You can use the Linear Fit tool to do this. Choose Tools:Linear Fit, then choose the Settings tab and select "Span X Axis" then go back to the Operation tab and hit the FIT button to run the linear fit.
Alternatively, edit the "Range Margin" setting on the Operation tab. This one allows you to control how far past the original data the fit curve extends (on either side) by specifying a percent value. This would allow you to extend the fit curve past the original data, but not all the way to the ends of the X axis scale.
Note: You would need to uncheck the "Span X Axis" check box to use this feature.