The default bands have defined (fixed) print events as follows:-
Title Once per report Choose Title/Summary from the Report menu.
Page header Once per page Available by default.
Column header Once per column Choose Page Setup from the File menu and set Column Number greater than 1.
Group header Once per group Choose Data Grouping from the Report menu.
Detail band Once per record Available by default.
Group footer Once per group Choose Data Grouping from the Report menu.
Column footer Once per column Choose Page Setup from the File menu and set Column Number greater than 1.
Page footer Once per page Available by default.
Summary Once per report Choose Title/Summary from the Report menu.
To print items only when a condition occurs you have to use the Print When in each object in the band as CMir is suggesting.
Bob Palmer
The most common solution is H2O!