The Output tools apply to Symbolic Calculations.
After you have made a calculation, click the resulting output, either in the drawing window or the output window. This will highlight entries in the Output tool box to refine your calculation.
The Output check boxes specify how the calculations are made and how the output is displayed.
Use Assumptions - applies to equations containing absolute values.
Use Intermediate Variables - can sometimes simplify the output.
The "Show" check boxes control where the output is displayed.
Click a check box to show (when checked) or not show (when not checked).