This is because the icons on the buttons are different sizes. RadioButtonGroup is used to create the buttons and it sizes all buttons to the largest icon dimension.
The easiest way to resolve this is to make the PNG icons files all have the same dimensions.
This is because the icons on the buttons are different sizes. RadioButtonGroup is used to create the buttons and it sizes all buttons to the largest icon dimension.
The easiest way to resolve this is to make the PNG icons files all have the same dimensions.