main.fxml

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.ListView?>
<?import javafx.scene.control.Tab?>
<?import javafx.scene.control.TabPane?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.image.Image?>
<?import javafx.scene.image.ImageView?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.BorderPane?>
<?import javafx.scene.layout.HBox?>
<?import javafx.scene.layout.VBox?>

<AnchorPane id="Anchor1" fx:id="Anchor1" minHeight="-Infinity" minWidth="-Infinity" prefHeight="590.0" prefWidth="1009.0"  stylesheets="@AnchorPane.css" xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1">
   <children>
      <BorderPane id="BorderPane1" fx:id="BorderPane1" layoutX="10.0" layoutY="10.0" AnchorPane.bottomAnchor="20.0" AnchorPane.leftAnchor="20.0" AnchorPane.rightAnchor="20.0" AnchorPane.topAnchor="20.0">
         <center>
            <TabPane id="TabPane1" fx:id="TabPane1" tabClosingPolicy="ALL_TABS" BorderPane.alignment="CENTER">
               <padding>
                  <Insets left="5.0" right="16.0" top="10.0" />
               </padding>
               <BorderPane.margin>
                  <Insets bottom="5.0" />
               </BorderPane.margin>
            </TabPane>
         </center>
      </BorderPane>
   </children>
</AnchorPane>