# Edit Definition

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# Edit Definition

This Edit menu command allows you to edit the definition of a selected calculation, function, or numeric parameter. When you choose this command, the Calculator appears, allowing you to modify the value or expression.

Editing definitions allows you not only to correct any mistakes you might make, but also to explore a mathematical model over an unlimited range of cases.

This command’s name changes to match the selected object.

Select: | For this command:
One calculation | Edit Calculation
One function | Edit Function
One parameter | Edit Parameter

You can double-click a calculation or function with the Arrow tool as a shortcut for Edit Definition.

When you edit the definition of a parameter, the Calculator appears. You can either enter a new value, or you can enter an expression and change the parameter into a calculation.