# Accessing the Script Designer
## Class Designer
Switch your app into Config Mode and navigate to the [Class Designer](https://docs.tivity.one/building-an-application/data/data-modelling). Navigate to **Data** > **Classes** to access the classes of the app.
Select a class, if already available, and expand the **Fields** node to reveal the fields collections.
### Real Field
Either you enter a field name in the **Add new field** data entry and hit *Enter* or you click an existing field to open the configuration view. Next, choose the `Advanced` section and in the `Real field` area you can either click on 
**Create and open default script** to add functionality to the field or click on **Open default script** to modify existing functionality
### Virtual Field
Any field which is marked with the 
code-fork icon on the right-hand side is a virtual field. Open the configuration view and switch to the `Advanced` section. Make sure the **Get Expression Type** in the `Virtual Field` section is set to `Script` and then click on either **Create and open expression script** or **Open expression script** to access the script definition.
To remove an existing script from a Virtual field click on 
**Delete expression script**.
### Pre-Script and Post-Script of an Action
Expand a class and open the **Actions** node to see the available functionalities. Open the configuration view to create or edit an Action. In the `Advanced` section you click on 
**Create and open Pre-Execute-Script** to define a script that is launched before the action is executed or **Open Pre-Execute-Script** to amend an existing script. Similarly, you click on **Create and open Post-Execute-Script** or **Open Post-Execute Script** to specify operations needed after the action has run.
A click on **Delete Pre-/Post-Execute Script** removes the script from your action.
## Query Designer
Launch the [Query Designer](https://docs.tivity.one/building-an-application/data/query-data) to create a new query or edit an existing query, and move to the [Fields](https://docs.tivity.one/building-an-application/data/query-data/query-designer-fields) register. In the `Virtual fields` section you click on either **Create and open script** to add a new script to the query or **Open script** to modify an existing script.
## Template Designer
Activate the Config Mode in your workspace and choose an application to configure. Navigate to the [Template Designer](https://docs.tivity.one/building-an-application/views/document-templates) under **Views** > **Templates** and create a new document template or edit an existing one. In the `Template` section you click on either **Create and open script** to add a new script to the template or **Open script** to modify an existing script.
## Function Designer
Navigate to your app [Functions](https://docs.tivity.one/building-an-application/execution/scripting/broken-reference) and create or edit a function. Click on either **Create and open script** to add a new script to the function or **Open script** to modify an existing script.
Scripts defined under Functions allow you to specify the **Return Type** of the value processed.
## Workflow Designer
Open the Config Mode of your app and navigate to **Execution** > **Workflows** to access the list of [Workflows](https://docs.tivity.one/building-an-application/execution/workflows-and-application-logic). Either create a new workflow or edit an existing one. In the Element Diagram select a Transition or a Step, and access the Script Designer in the `Script` section.
Click on either **Create and open script** to add a new script to the workflow element or **Open script** to modify an existing script.
##
