Usually, this component will simply contain labelled Apache Trinidad input components in its main content - these are inputText, inputFile, inputColor, inputListOfValues, inputDate, selectBooleanCheckbox, selectBooleanRadio, selectOneChoice, selectOneListbox, selectOneRadio, selectManyCheckbox, and selectManyListbox. These components must have their "simple" attribute set to false, which is the default, and will cause the labels and fields inside the panelFormLayout to be aligned vertically.