> For the complete documentation index, see [llms.txt](https://docs.gaiodataos.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.gaiodataos.com/tools/params.md).

# Params

<figure><img src="/files/GB5DLNTtLj4EiVOPZn06" alt=""><figcaption></figcaption></figure>

The **Parameters** feature allows you to create reusable variables within your process (flow). These can be used in SQL filters, environment variables for JavaScript scripts, or to transfer values between execution blocks.

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### &#x20;**Where to find it**

The **Parameters** tab is located in the left side panel. When you open a studio menu, you'll see the dedicated area for parameter creation and editing.

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### **How to add a new parameter**

1. Click the **“+”** button in the upper right corner of the Parameters tab.
2. A configuration window will appear with the following fields:
   * **Param name**: Unique name of the parameter (required).
   * **Description**: Optional field to explain the purpose or usage of the parameter.
   * **Value**: Default value to be used during executions (can be changed dynamically).
3. Click **Save** to create the parameter.

{% hint style="warning" %}
When using parameters in filters within dashboards, if you want all values as default, use 'all\_'.
{% endhint %}

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#### **How to use parameters**

Once created, parameters can be used across different blocks in your flow:

* In SQL queries: use the syntax `{{ parameter_name }}`
* In JavaScript blocks: {{`params.parameter_name}}`
* Builder: Computed: `{{ parameter_name }}`
* In dashboard visual filters: use parameters to dynamically filter your data

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#### **Managing parameters**

* **Edit and Delete**: Click on the three dots and select option.&#x20;
* **Copy:** Click on copy.

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#### &#x20;Notes

* The **User ID** field is a special internal parameter and can be used to identify the current user.
* Parameters are scoped to the current flow and do not affect other projects or processes.
* You can define and use multiple parameters simultaneously across your flow.