Every input field stores its value in a variable, and the variable name is how you refer to that value in expressions. A field whose variable name is headline, for example, lets you write expressions that read headline.
The name sits at the top of the field's editor. Edit it and confirm with the checkmark. Two rules apply:
- It must be unique within the template.
- It must be a valid name: letters, numbers, and underscores, with no spaces.
Most of the time the default name is fine. Rename it when you want something memorable to use in expressions, or to keep your variables tidy.