Header Options can be updated through customizer.
Navigate to Appearance > Customize
There are 3 available sliders to choose from 3 Post slider, 2 Post Slider, and Full Header Slider
You can also disable the header top bar. By doing so social media icons, hidden sidebar and the Full-Screen search form will be also disabled.
You can select to display posts from all Categories or from an individual category.
If you select all categories, the latest posts will be displayed.
In case you need to display selected posts only, you will need to create a category for this purpose, and add the posts you would like to be displayed in it.
You can also opt to display the header slider on all pages of the blog