How can I make sections at the bottom of the application
as the following picture
You can put a landscape layout at the bottom of the screen and put 4 buttons with the appropriate graphics in it.
Did you post this somewhere else also? I seem to remember the image.
As @Patryk_F has mentioned, you can put a Horizontal Arrangement at the bottom containing four buttons. After that, you can make (or if you're like me, take screenshots of) the images. Just use the Button "Background Image" property to change it.