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Update Variable is used to change the contents of an existing variable.
1

Add an Update Variable function to your function stack.

2

Select the variable you want to update.

You can start typing the variable name, or click the dropdown to select it from the list.
3

You can update the variable as a whole, or use dot notation to target a specific piece of data inside of it.

For example, if we have an author variable, and want to update the author’s name, our dot notation might look like this:
author.name