Featured Content for Catch Fullscreen.

@ariel: Hello there,
The white page shown is the Featured Slider Section. This maybe because you have not selected the pages you want to show on the slider as the slider is empty.
The slider and portfolio section shows up as you seem to have enabled them on Homepage.

To change the number of slides.
Go to => Appearance => Customize => Theme Options => Featured Slider => No of Slides => Change the number and publish and then refresh the customizer page.

Let me know if this works out!
Kind Regards,
Skandha

@ariel: Hello Ariel,
I can see Galleries, Media and Home slides on the featured slider section.

To change that slider content
Go to => Appearance => Customize => Theme Options => Featured Slider => Now you can select the pages you want to show up in the slider section.

Let me know if you are still having issues with the slider.
Kind Regards,
Skandha

@ariel: Hello Ariel,
The featured slider section is the horizontal slider so to make any changes to it you will need to
Go to => Appearance => Customize => Theme Options => Featured Slider.

All other sections like Portfolio, Featured Content, Hero Content, Service and Testimonial show up in the vertical slider. So if you don’t want Projects section
Go to => Appearance => Customize => Theme Options => Portfolio => Select Disabled.

Other than these sections the vertical slider contains a static homepage or latest posts section.
You seem to have selected a static page as your Homepage.
You can Go to => Appearance => Customize => Homepage Settings => Your homepage displays => Your latest posts. This will display all your posts on the Homepage like Green Meadow, Before I had time to respond and so on in this link.

Hope this was helpful.
Let me know what you would like to do.
Kind Regards,
Skandha

@ariel: Hello Ariel,
To have the main menu appear on top of the homepage
Go to => Appearance => Customize => Additional CSS and add the following CSS Code.

#header-content {
	top:0;
	bottom:unset !important;
}
.header-top #header-content, .home #header-content {
	animation:unset !important; 
}

To disable featured slider (horizontal slider) on all pages except homepage
Go to => Appearance => Customize => Theme Options => Featured Slider => Enable on => Select Homepage/Frontpage

The vertical slider will be disabled on other pages if you don’t add any other sections like Portfolio and so on and enable them on Entire Site.

Let me know if this works out!
Kind Regards,
Skandha

@ariel: Hello Ariel, I hope I was able to resolve your issue. If it’s not too much trouble, I have a quick request: could you please leave an honest review?
https://wordpress.org/support/theme/catch-fullscreen/reviews/#new-post
Your review will help others know what to expect when they’re looking for the support I offer. Even a sentence or two would be hugely appreciated. Thanks, and if there’s anything else at all that I can do to help, don’t hesitate to let me know. Have a good day! 🙂

Kind Regards,
Skandha

@ariel: Thank you very much for your appreciation. Have a good day! 🙂

Kind Regards,
Skandha