To

Do this

Create a new variable

Enter a new name.

Specific naming conventions are in effect when naming variables to pass signals. Other conventions are in effect when naming variables to reference files.

When using variables to pass signals, you can limit the scope of the variable. To limit the scope to the local level, preface the name with a colon (:); preface it with two colons (::) to make it definition-scoped, or no colons to make it global.

Reference a built-in variable

Choose a built-in variable from the drop-down list.

Reference an existing variable

Choose a name from the drop-down list.