You can create Scenarios by clicking the **Edit** button **(1)** in the Scenarios section of the **Model Settings** area of the [**Model Editor**](/models/model-editor.md).
This will open a wizard **(2)** in which you can view, edit and create Scenarios.
When creating a Scenario, you can select another Scenario on which to base the new one. In the above example, the `Lean` Scenario is based on the `Base` Scenario. This means that if a value isn't specified for an Assumption for the `Lean` Scenario, its value will be taken from the `Base` Scenario.
{% hint style="info" %}
If you do not specify a "based on" Scenario, you will need to specify a value for every Assumption for the new Scenario
{% endhint %}
## Entering Scenario values
### In the Assumptions wizard
You can enter values for different Scenarios in the [**Assumptions wizard**](/assumptions/assumptions-wizard.md). To do so you will need to first select the Scenarios that you want to edit, in the **Setup step** **(1)**. The **Values step** will then include all selected Scenarios in the values input table **(2)**, where you can edit them freely.
Editing Scenario values in the Assumptions wizard
### In the Assumptions list
You can edit Scenario values directly in the Assumptions list in the Assumptions tab of the [**Model Editor**](/models/model-editor.md).
Just click in the value you would like to edit **(1)**, enter a new value, and press **Enter** to save. You can delete a Scenario value using the delete button **(2)**, or by deleting the value and pressing **Enter**.
Editing Scenario values in the Assumptions list
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