rtf template balance lines between two adjacent cells

Summary: RTF Template - Balance lines between two adjacent cells

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We've modified our invoice print template to include serial numbers when applicable. This is done using a for each that prints out the serial numbers. These are all in a single table cell. The problem is that when there are many serial numbers, the invoice could end up being several pages long. We'd like to have the serial numbers print in two adjacent cells, balanced, to take up less space. I haven't been able to figure out how to do this. Is it even possible?

Thanks

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