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

# ConditioningSetMask - ComfyUI Built-in Node Documentation

> Complete documentation for the ConditioningSetMask node in ComfyUI. Learn its inputs, outputs, parameters and usage.

This node is designed to modify the conditioning of a generative model by applying a mask with a specified strength to certain areas. It allows for targeted adjustments within the conditioning, enabling more precise control over the generation process.

## Inputs

### Required

| Parameter       | Data Type      | Description                                                                                                                                            |
| --------------- | -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------ |
| `CONDITIONING`  | CONDITIONING   | The conditioning data to be modified. It serves as the basis for applying the mask and strength adjustments.                                           |
| `mask`          | `MASK`         | A mask tensor that specifies the areas within the conditioning to be modified.                                                                         |
| `strength`      | `FLOAT`        | The strength of the mask's effect on the conditioning, allowing for fine-tuning of the applied modifications.                                          |
| `set_cond_area` | COMBO\[STRING] | Determines whether the mask's effect is applied to the default area or bounded by the mask itself, offering flexibility in targeting specific regions. |

## Outputs

| Parameter      | Data Type    | Description                                                                     |
| -------------- | ------------ | ------------------------------------------------------------------------------- |
| `CONDITIONING` | CONDITIONING | The modified conditioning data, with the mask and strength adjustments applied. |