# copyFieldNoOverwrite

The `copyFieldNoOverwrite` method copies the sub field to another sub field but does not overwrite the destination. After this operation the destination field contains all the values of the source field as well as any values it already had.

## Syntax

    copyFieldNoOverwrite( from, to [, case])

## Arguments

Argument | Description
--- | ---
`from` | (string) The name of the field to copy.
`to` | (string) The name of the field to copy to.
`case` | (boolean) A boolean that specifies whether the `from` argument is case sensitive. The argument is case sensitive by default (`true`).

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