From left to right on the main window:

Sidebar*: Swipe horizontal: Switch "All Items" / "Unread" / "Stared"

Article List*: Swipe horizontal: show / hide sidebar

News Reader:
Swipe horizontal: Switch "Article summary" / "Clutter-free" / "Website"
Note: In Website mode you can use horizontal swipe to navigate back/forward, the same way as you can do in Safari

Swipe vertical: next/previous article
You can disable/enable News Reader gestures at Preferences / General / News reader section

*: Three finger swipe gestures do not work. Make sure that “swipe between pages” option is not set to "swipe with three fingers” in System Preferences / Trackpad. If it is set to "two or three fingers" option, you can only use two finger swipe
Category: News, Feedly, Feedbin, RSS
Compatibility: MAC OS X Yosemite, El Capitan
Leaf: News Reader for Mac OS X (Yosemite, El Capitan)

Leaf is an amazing news reader for Mac OS X (Yosemite, El Capitan). Read, share, star and search news from all of your favourite websites by using a clean, intuitive, OS X Yosemite, El Capitan-style next generation interface. Leaf is supported feedly and feedbin. Feedly App for Mac OS X, Feedbin App for Mac OS X