How to make a new Stage in Java-fx and how to make that stage as pop-up?
<p>I want to make a new stage in JavaFX and when I will click a button the new stage will pop-up with a new <code>scene</code>.</p>

<p>When the new <code>scene</code> will pop-up previous stage will appear but wouldn't work. When I would close the pop-up then the previous window will work. Please help me to do that.</p>