is possible increase the size of the buttons in dialog.
I need to be bigger.
Thanks
You can achieve it by accessing the ButtonBar of the dialog you created and then customize the buttons in it.
First get the ButtonBar instance:
ButtonBar buttonBar = (ButtonBar)yourDialogInstance.getDialogPane().lookup(".button-bar");
Then get all buttons applied to the dialog pane and set the style for them via a string containing css. For example:
buttonBar.getButtons().forEach(b->b.setStyle("-fx-font-size: 18px;"));
A lot more detail: Customizing Dialogs