Removing margin/padding

I removed the page title with a css code and that left a white blank space between the header menu and the content. I think it is margin. How do I remove the blank space.

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• This topic was modified 3 months, 1 week ago by trues.
• This topic was modified 3 months, 1 week ago by trues.
• This topic was modified 3 months, 1 week ago by trues.