if this is the Meeting Details layout, there is no scroll bar on the right hand edge of the field, there's a scroll bar on the right hand edge of the portal. You need to click the Add topic button to add a new topic to the list--which adds a new row to the portal. The scroll bar will start working once you have added at least 5 topics--so that there are more portal records than can be seen at one time in the portal.
But you can select the ::text field while in layout mode and select a scroll bar option for it from the inspector's data tab for it if you want one.
AWESOME! That worked. Thank you for putting up with my "stupid" newbee questions. I'm sure this will click eventually! :)