How to remove it?

Hello

Thank you for your query. Do you want to remove that entire section?
Please provide your site URL here.

Thank you for the URL.

As the standard template is being used here, it is rendered this way. Please use a template of your choice from here: https://www.joomshaper.com/joomla-templates

Sorry, you have to use some template in order to render your pages.

To use a different template go to Menu Extensions -> Templates -> Styles. And choose a different template as default. If there is no template availabe then you need to install a new one.

Please read the following tutorial to know more about Joomla templates.
https://docs.joomla.org/Special:MyLanguage/J3.0:Getting_Started_with_Templates

Actually, you can do that using CSS but that won't be a good option.

SP Page builder works inside the component area only, but the header and footer section are under the template. So you will not be able to use SP page builder to control anything that goes beyond the component area.

If you do not like anything beyond this component area, then for those you can create a module and use it as per your convenience. And to remove those, you can then go to Module section, you will find the menu and log in module there. Also, in default template of Joomla, there are some active predefined module position too.

However, i would suggest you to use our templates as the menu structure of it is better and will be helpful for you. You can also use the Page builder layout packages to build your page.

Hope i could explain it clearly, please do let me know if you have any confusion.

I can see that you have downloaded Helix Ultimate now and everything looks alright from my end. If further you need any help, please do let me know.