When you have a linear fit displayed on the graph, double-click the Linear Fit box to display the Curve Fit Options dialog. Here you can change the appearance, displayed precision, and the uncertainty.
Set the displayed precision based on Decimal Places or Significant Figures.
Click Appearance to change the text font and color in the Linear Fit box.
Check Show Uncertainty to show the uncertainty of curve fit coefficients for Automatic curve fits. New Curve Fit boxes will share the current setting. If Show Uncertainty is checked, all future curve fits will be on as well. If you uncheck it, then any new curve fits will not show uncertainty values.
Uncheck Show On Graph to hide the Curve Fit box. Choose Reveal Hidden Objects > Additional Object Options from the Options menu to display the Curve Fit box again.
Check Use Entire Range to have Logger Pro perform the curve fit on the entire of data set.