How you can update the Main Image of any Page
1- Log into your admin panel, go to the Pages section and click "Content Pages".
2-In the title of the page that you wish to upload the picture (for example, Home), then click the "Images" button.
3- Select or Drag your pictures to the square section, and let them load
4-Select the area of the picture you want to feature and click on "Crop to Selection". Wait until your picture is done cropping, then you are done!