[Theme Horse Support Team]

Hi idealinfos,
Go to Appearance -> Theme Options -> Design Options Tab -> Custom CSS paste the following CSS code and Click on save all changes button:

#main .container {
  max-width: 90%;
}

We have spend lots of time and efforts to develop this theme available free for you.
Could you also please help us rating this theme in WordPress Repository.
https://wordpress.org/support/view/theme-reviews/ultimate
We really appreciate your rating.

Thank you!