Laptop home screen?

I need help, can jmd tell me how to change my screen (image2) so that it is as before (image1)? I seem to have chosen something. Looking forward to a quick answer

Lg

)

Disable tablet mode

You can adjust your wallpaper size to do some tricks if you want to adjust the size

either you open the gallery and right click on it and then use it as wallpaper or you can

or you look in the control panel on the background image to adjust ^^