Limiting the size of output cells
To limit the number of IDs generated by data manipulation processes such as Audience, Extract, Merge, or Select, click the Cell Size Limit tab of the process configuration dialog.
The options that you have for limiting output cell size depend on whether the process accepts input from a cell or a table. In processes that can accept either type of input, the Cell Size Limit window changes dynamically to present options appropriate to the input type.
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For either type of input, you can also change the random seed for use in selecting IDs randomly.
Processes taking input from an output cell
Limiting the output cell size based on the input cell size
Processes taking input from a table
Applying test run output cell size limitations