# Age synthesis options

When you select the **Synthesis** option for the Age entity type, you can either:

* Shift the age within a specific range.
* Pass through ages younger than 90, and group ages 90 and older into a single value.

<figure><img src="/files/svd5ERZy01WjxlLur7BE" alt=""><figcaption><p>Synthesis options for age values</p></figcaption></figure>

## Shifting the age within a range

To shift the age within a specified range:

1. From the **Age generator type** dropdown list, select **Age shift**.
2. In the **Range of Years +/- for the Shifted Age** field, enter the number of years before and after the original value to use as the range for the synthesized value.

By default, Textual shifts the age value to a value that is within 7 years before or after the original value.

## Passing through or grouping the age value

Based on the original age value, to either pass through or group the value, from the **Age generator type** dropdown list, select **Passthrough or group age**.

With this option:

* If the original age value is younger than 90, then the value is left as is in the output.
* If the original age is 90 or older, then the value is replaced with `90+`.

## Indicating whether to scramble values that Textual cannot parse

By default, Textual scrambles age values that it cannot parse.

To instead pass through the value unchanged, uncheck **Scramble Unrecognized Ages**.


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