# Params
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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### **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.
* **Copy:** Click on copy.
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#### 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.
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