To have the feature to show all the sale items in a page please follow below instruction.
– First of all create the page “Sale” in Admin Panel > Pages .
– Now paste below given short code in the content section.
[sale_products columns=”3″ per_page=”12″]
– Now add the created page to the menu by going to Admin Panel > Appearance > menus .
You can also change the parameter of the short code . Please refer to below link foe more info:
Similarly the feature to show the slider is not available in the theme . Although it is possible for you to achieve your request on the theme with advanced code customization of the theme, it might effect other parts of the theme, like its design and at times its functionality.
Our suggestion to you is to hire a professional developer for your customization, so that your theme will no be effected in any way.
To hire a developer please follow the link below
We hope it helps,