# Environment preferences

Use the Environment preference panel to define environment variables and their use.

Environment Options
Options | Description
--- | ---
Environment variables to set | Shows a list of the environment variables and their value.
New... | Click to open the New Variable dialog where you define the variable name and value.
Select... | Click to open the Select variables dialog.
Edit... | Click to edit the currently selected variable and its value.
Remove | Click to remove the currently selected variable.
Undefine | Click to undefine the currently selected variable. NOTE: Some variables, like PATH, have special meaning and cannot be undefined.
Append variables to native environment | Activate this checkbox to append the variables to the native environment during execution.
Replace native environment with specified one | Activate this checkbox to replace the native environment with these variables, restoring the native environment upon completion.