Is it possible to activate Slider on all pages and menu options?
I hope you are well today and thank you for your question.
You can display slider on all pages by using the custom child theme solution posted in the following topic.
Activating child theme slider all pages ok
But pages do not appear summary with button read more
Refactor summary options in wordpress and theme settings
I am not sure what you are referring so could you please describe it a bit more in detail by sharing screenshot of it?