diff --git a/src/Client/src/main/resources/fxml/FirstCalculator.fxml b/src/Client/src/main/resources/fxml/FirstCalculator.fxml
index 58f37f7..f9c6c74 100644
--- a/src/Client/src/main/resources/fxml/FirstCalculator.fxml
+++ b/src/Client/src/main/resources/fxml/FirstCalculator.fxml
@@ -170,7 +170,7 @@
                <font>
                   <Font size="14.0" />
                </font></Text>
-            <Button fx:id="showExplanation" layoutX="31.0" layoutY="534.0" mnemonicParsing="false" prefHeight="63.0" prefWidth="52.0" style="-fx-background-color: transparent; -fx-padding: 0 0 0 0;">
+            <Button fx:id="showExplanation" layoutX="31.0" layoutY="534.0" mnemonicParsing="false" onAction="#showExplanation" prefHeight="63.0" prefWidth="52.0" style="-fx-background-color: transparent; -fx-padding: 0 0 0 0;">
                <graphic>
                   <ImageView fitHeight="62.0" fitWidth="83.0" pickOnBounds="true" preserveRatio="true">
                      <image>