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I am thinking in using the same kind of layout for my app like the one used for the App Store on MacOS, but i cant find any way to do this.I want to have the left side display 3 or 4 options, and on the right side it will change wich depends on what you choose on the left side. like for example, on the left side of the App Store there is the "Discover" , "Create" and so on Buttons, and as soon as you press on it, the right side of the interface change, depending on what you choose. The left side always stays locked in one place, while the right side change depending on what you choose on the left side. Im not sure if i explained it good enough, but yeah im really new in app development, and this has me stuck on one place.Thanks