GridPane will work too. For the FormTest.kt examp...

# tornadofx

[carlw]

GridPane will work too. For the FormTest.kt example, add a 1x4 GridPane with Label and TextArea alternating. The constraints for the Label are grow=NEVER and those of the TextArea are grow=SOMETIMES.

The two TextAreas divide up the extra vertical. All components will stretch out horizontally.