ActiveMerge, Runs tab, Preferences Dialog Box (Purify Coverage Data)

Select whether Purify merges coverage data in layered datasets that allow you to distinguish and evaluate the contribution of each component run. This setting applies to all subsequent merges, both automatic and manual, until you deselect it.

If this option is not selected, Purify merges coverage data in undifferentiated datasets, as if all the data had been collected from a single run.

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