# Form Design Each form is linked to a data source, whether spatial or non-spatial. Forms are built using **components** arranged in either **simple or complex layouts**, depending on the requirements. In most cases, each form component is directly associated with a field or attribute from the data source, which is accessed through the layer or table connected to that source in JMap NG. The form design interface allows you to define both the content and the layout of the components. The illustration below shows the main sections of the form design interface.
1Components tab.
2Available components.
3Design tab.
4Design tab interface that displays the components added to the form.
5Properties of the component selected in the Design interface.
6Layout tab.
7Component layout features for form layout.
8Preview tab.
9Preview tab interface showing how the form looks in a JMap NG application.
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