Select the Functions tab in the Time function definition dialog to define the name of the time function.
Define the name of the function and click ADD to include it in the list of available functions.
To delete a time function, select it and click Delete.
To change the name of a time function, select it, click Modify, and enter the new name.
To save a time function to a text file, select it, and click Save to file.
To import a saved time function definition text file, click Open from file, navigate to the location of the file, select it, and click Open.