Select the Macros tab.
Select the macro you want to change.
Choose Properties from the Edit menu.
The Macro Properties dialog box opens.
In the Option Name field, specify the name of an option by using one of the following methods:
Click the Select button next to the Option Name field and select the option you want to add to the macro.
The Select Option dialog box displays an alphabetized list of names of Standard category options and descriptions. If you want to add an option that is not in the Standard category, use the Category list to select the category you want.
See About Macros for more information about macro categories.
Type Include if you want to include a reference to an existing macro in the new macro.
Type the value for the option in the Option Value field.
If you typed Include as the option name, you must specify the name of an existing macro in the Option Value field.
The option is added to the bottom of the list of options displayed for this macro. If you want to change the option's position in the list, select the option and click the arrow keys next to the list to move the option up or down.
Select Notify DHCP Server of Change.
This selection tells the DHCP server to reread the dhcptab to put the change into effect immediately after you click OK.