On the Sheet List tab, right-click the
sheet set node. Click Properties.
In the Sheet Set Properties dialog box,
click the Edit Custom Properties button.
In the Custom Properties dialog box,
do one of the following:
Click Add to create a new custom property
for the sheet set. Click the name and the default value to enter
the information for these fields. To assign this property to the
sheet set, make sure that Sheet Set is selected under Owner.
Click the name and the default value
to change the information for these fields.
Click a custom property from the list.
Click Delete to remove the property.