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EES provides an option in the Preferences dialog to display a sum row in the Parametric table. This option and other preferences are not saved with a EES program but rather with the user preferences. In some situations, it is desirable for the EES program to control whether the sum row is to be used. This can be done simply with the following directives which are placed in the Equations window.
will ensure that sum row in the Parametric table is visible.
will ensure that the sum row is hidden, overriding the setting in the Preferences window.