How to put this photo in perfect size - i fail everytime

Hello, i need help. I build my first Webside in general.
I use the free normal Astratheme. This the regular Desktop view.

  1. I upload a pitcure with 2500 x 1600 round about, really big, if i take the photo for the photo box. It stays this size. The settings from beaver builder, i cant change it the way i want with the normal settings.
    The hight is okay but i could not adapt, if it would not be the size. But the width i cant change it the way i want…

Thanks for helping me out!