Tab Name Expression - Report Book

[linden]

Hi,

I'm using Jaspersoft Studio 6.0.3. I created a report book with a few parts in it. When I click on one of the parts and look at the properties window it shows the regular "Print When Expression" but also "Tab Name Expression". I'm wondering what this tab name expression is about and how to use it. I read the tooltip but its still not making much sense to me.

Thanks in advance,

Linden