CalcBuilder Tutorial

Radiobutton is a single-choice control where every option is visible at once — good for two or three mutually exclusive choices.

Key settings

Same Options editor as the Option List. Set a default so one is pre-selected.

In code

$variable is the chosen option’s value ('m' / 'y' in the demo).

Part of the Form Fields reference. All types are demonstrated together in the Field Types Showcase.