> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ntop.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Passive Region Constraint

Define an FE Region to maintain unaltered during the optimization process.

### Inputs

| Name | Type | Description |
| - | - | - |
| Region | [Region](../../../../block-documentation/types/region) | Region to be frozen. |

### Outputs

| Type |
| - |
| [Design Constraint](../../../../block-documentation/types/design-constraint) |


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