Not sure exactly where they were referencing but here is
one way to accomplish this.
Right click on the group header field.
Select the Common tab.
Midway in the window there is a "Display String" with a formula box option (X-2).
Click on the formula option.
In the formula window add the following formula:
{table.groupedfieldhere} + If InRepeatedGroupHeader then ' Continued'
Save and close.
Hit OK.
Check your results.