These are a few tips for navigating Unread for Mac via keyboard.

Scrolling via Space Bar

You can scroll down one page in the current article by pressing the space bar. If Unread is already at the end of that article and you are in a main viewer window, Unread will advance to the next article in the article list.

Clear Read Items

You can clear read items with ⌘' (command-apostrophe). By default that will leave the currently selected article, even if it is read. You can clear read items including the currently selected article with ⇧⌘' (shift-command-apostrophe).

Single Letter Keyboard Shortcuts

These keyboard shortcuts are available in English keyboard layouts. They are not available in all keyboard layouts:

J: Select next article
K: Select previous article

N: Select next feed in the source list
P: Select previous feed in the source list

L: Select next pane in the main viewer window
H: Select previous pane in the main viewer window

B or V: View on web

A: Mark all read