You can now try our new experimental Derived Column Editor! This includes updates such as a larger editor to create your expressions, function autocomplete, and inline error handling. Toggle it ON or OFF in the Derived Column Modal which can be accessed via
Dataset Settings >
Derived Column >
Add New Derived Column.
We're still testing updates and changes to the Derived Columns experience. If you have any feedback, feel free to share them in our Pollinators
#ux-feedback channel or via the Survey in the New Editor tooltip.