viewport - How to change the view port in javafx? -

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i have created screen gui . enter image description here

now after program starts want show user firstbtn this:enter image description here

and after button clicked screen moves in direction of arrow in picture , goes secondbtn enter image description here

now how should move screen , change view port.

you may use different scenes same stage.

 primaystage.setscene(yourscene1);

and same when needed yourscene2

primaystage.setscene(yourscene2);

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