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The Project Designer window appears. It is divided into four panes:

                                                          Viewer pane         All Components pane













                       Palette
                        pane                                                                            Properties
                                                                                                           pane








                     Palette pane: On the left, there is a palette pane from where we can select components like
                    buttons, images, and other functions required for our app.

                     Viewer pane: To the right of the palette is the white area where we can view and arrange
                    added components.

                     All Components pane: This pane shows a list of all the components added to the screen in
                    a hierarchical view. It also has a dropdown list with options such as All components, Visible
                    components, and Non-visible components.
                     Properties pane: When we click on a component in the viewer, we see its properties listed here.
                    Properties of the components can be changed from here.


                  CREATING A TALKING APP
                  In the Project Designer window, we will design the interface by choosing buttons, images or
                  text boxes and specify the functionalities of our app. We are going to create a simple talking
                  app.


                  Adding a Button
                  Drag  and drop a  button  from the
                  Palette pane to the Viewer pane.


                  Testing the App

                  App Inventor allows us to test our
                  app while creating, so to test your
                  app,  connect  your  android  device
                  and download MI A12 companion.







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