The Plus (+) and Minus (–) buttons add and delete OR rows to find results that match the criteria either in the top row or the additional rows.1 Click the (+) button to add an OR row identical to the upper row, but with no entries in the search fields.2 To add an additional OR row, click the Plus (+) button again. (An empty OR row has no effect on the search.)
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Type Dog in the first File Name field.
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Type Bark in the second File Name field.
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Click the Minus (–) button to delete the bottom OR row.