# Apply button
{% hint style="info" %}
By default, the **Apply** feature works only with **active configurations** (those currently open).
{% endhint %}
### **Usage**
There are **several ways** to **apply** configurations to a wall through the configuration window:
1. Apply without selecting a configuration
2. Apply to a specific wall layer
3. Apply multiple configurations to separate wall layers
Please refer to the explanations below for more detailed information on each method.
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#### 1. Apply without selecting a configuration
1. After creating or selecting a configuration, click **Apply**.
2. Choose one or several walls to apply the configuration to.
By default, if a wall contains multiple layers, the **active** configuration is applied to the **thickest structural layer if no configuration is selected.**
***
#### **2. Applying to a Specific Wall Layer**
If you want to apply a configuration to a **different wall layer**, follow these steps:
1. Open the **Link** **Wall** command within configuration window.
2. Select the desired **Wall Type**.
3. Enable the **checkbox** next to the layer.
4. Click **Apply** to apply the configuration to the currently selected wall.\
If no wall is selected, you can select one after clicking **Apply**.
When the checkbox is selected, the configuration will be applied **only** to the chosen layer.\
If the checkbox is **not selected**, the configuration will default to the **thickest wall layer**.
{% hint style="info" %}
**Important:** The configuration does not need to be assigned in the **Link Wall** command (within the Configuration Window) for a specific layer — only the **checkbox** needs to be selected for the **Apply** button to function.
{% endhint %}
***Example 1:***\
\&#xNAN;*After the configuration was applied, but **not checked** in the **Link Wall** command,*\
*the tool automatically detected the thickest wall layer and added the rebars accordingly.*
*When the configuration is applied to a **specific layer**, the tool identifies that layer within the wall structure and places rebars based on the defined configuration parameters.*
***Example 2:***
*If no specific configuration is selected for one layer, but the checkbox is checked for both layers, the same **active configuration** (marked as **No. 1** in the image below) will be applied to both layers. Then, the configuration (marked as **No. 2** in the image below) selected in the **Wall Link** command will be ignored, as it is not an **active configuration**.*
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#### 3. Create rebars to all wall layers within the configuration window
To ensure all selected configurations are applied to a wall, follow the steps below
1. **Expand the Link Wall Tab.**
2. **Select all required configurations.**\
In the configuration list select all configurations you want to add to the wall, and check the box
3. Click **Save Configuration** to store the selected configurations as a group.
> This step ensures all selected configurations are included in the saved setup.
4. **Select the target wall.**\
In the model or drawing, select the wall to which the configurations will be applied.
5. Click **Create Rebar** command.
***
The **Link Wall** command available within the **Configuration Window** and the **Wall Reinforcement** tool refers to the **same feature**, designed to assign specific configurations more efficiently.
