A tremendous amount of reporting power has been packed into FileMaker Pro with an incredibly easy-to-use and flexible interface. The power and simplicity behind adding and deleting parts to organize your pages almost makes it too easy to create a sophisticated printed report. However, when a subsummary group crosses a page break, the subsummary part content doesn't repeat itself, requiring you to flip back and forth between the pages. During my five year tenure at Claris technical support, this was one of the top ten requested features. Twenty years later and there's still no way to attach a calculation formula to a part much like you can with Access Privileges to create conditional records. At least add a check box to repeat the subsummary part contents at a page break. Until some future upgrade, parts obey one set of rules embedded in the FileMaker code base. For now, your best bet is to employ workarounds for conditionally calculating subsummary content.

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