> For the complete documentation index, see [llms.txt](https://docs.tonic.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tonic.ai/textual/dataset-configure-redaction/textual-datasets-synthesis-options/synthesis-options-for-specific-entity-types/synthesis-options-age.md).
# 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.
Synthesis options for age values
## 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.
3. To shift all ages in a file by the same amount, check **Apply same shift for entire document**.
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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