Labels

In a toolbar or menu button, you can use the @label modifier to set the button label dynamically using the evaluator.

As a very basic example, @label:=return "Hello!"; would set the label to "Hello!".

Spacer (with labels turned on) and Label fields can also use the evaluator; you don't need the @label: part for them, just put your evaluator clause in the label field preceded by a = symbol.

The original label is available as the original_label variable.

The return value from the evaluation expression will be used as the label for the button.