Variables tab
The Variables tab in the Build Rules Configuration dialog is used to set environment variables.
![A screen shot of the Build Rules Configuration dialog - Variables tab.](Images/build_rules_variables_tab.png)
Environment variables
The Variables tab lists environment variables set for the selected language. The integrated Toolbar allows for adding, deleting and editing environment variables.
- Add a variable
- Click on the add icon (+) to add a new environment variable. See Add or edit environment variables.
- Delete a variable
- Select an existing variable and click the button to remove it.
- Edit a variable
- Select a variable and click this button to modify variable settings. See Add or edit environment variables.
Providing variable values
In addition to using hard-coded values when defining variables, you can use predefined node variables. See Predefined node variables.