In the design Tool Bar you have a combo that list all the fields in the
report, try and find a field called pagebreak asuming you didnt change it
name.
Click on it and the focus will mve to that field.
Or you can go to" view " in the menubar, choose to show the list of the
field and try to find the field. click on it and the focus will move to it,
its easier to use that because it will display only the fields without the
other section in the report.