Where do you mean? Do you mean the blue in the header?
go to your global.css and find
#mainwidth {
text-align: left;
line-height: 1.4;
margin: auto auto;
margin-top: 60px;
width: 90%;
}
remove the:
margin-top: 60px;
and save it
Sorry, but I needed to install mybb again and if I remove that code, nothing happend this time. Help?
^ changed code is working. hard refresh your browser (eg. press CTRL + F5) and check again