Hey Leo,
Welcome to our Support Forum and thanks for writing in.
With Pro, that is possible. I’d first like to clarify though that our sales page header does not use a slider. You can use a slider though. It’s just that you’d need to use a different method which I’ll detail below.
Using Slider Revolution
If you’re going to use Slider Revolution, you’d need to use a Full Screen Slider Layout
Then, you need to offset the height of the header. You can do that by inserting the class of the header which is x-masthead
in the Decrease Module Height > by Container field of the Full Screen Layout setting.

If you noticed, there’s a dot before the x-masthead
because it’s a class. If you’re targeting an ID, a #
hash should be used.
For more details about Slider Revolution usage, please go through the documentation here: https://www.themepunch.com/support-center/
Next, you need to add the slider on the page using the Slider Above Masthead Page Setting.

Using a 2 bar setup where the first bar will cover most of the screen
In this setup, set the height of the first bar to 80vh or depending on the ratio you need. What’s important is you use the VH unit like in the screenshot below.
The 2nd bar which will contain the menu should be 20vh.
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If you’re interested to replicate the design of the layout and design of the menu, you need to learn how to use the Flex Options available in the elements. For more details, please see https://theme.co/docs/use-flex-layout.
I’d also recommend checking the rest of the tutorials available in our Themeco Docs and also our Youtube Channel.
Hope that helps.