How individual posts look is controlled in WPZOOM → Theme Options → General → Single Post Options, plus a per-post layout choice.

The Post Layout metabox in the editor lets each post use the sidebar layout or full width:

Post listings can load more posts automatically via Jetpack‘s Infinite Scroll module — configure the trigger in Settings → Reading, and the button label in Theme Options → General → Infinite Scroll → Load More Button Text (default: Older Posts).
What’s Next?