Background problem

Please help me with background. This is normal, see the green list at bottom.
https://imagizer.imageshack.us/v2/1334x356q90/540/ik5yXJ.jpg
Now I don’t know what i do, the green list at bottom became large and rise up.
https://imagizer.imageshack.us/v2/358x989q90/911/64j4yA.jpg

What do i have to change to return it to normal? Any help will be appreciated.
Thank you.