HOW TO view both read and unread posts within Feedly

Feedly, the popular Google Reader alternative, shows unread posts only by default, possibly to reduce clutter. This may lead new users to believe that old feeds cannot be retrieved later unless is it "Saved for Later".

It is only when you go to Settings (represented by the cog icon) that you realize that there is a filter called Unread Only that is selected by default which causes only unread posts to be shown. To view both read and unread posts, you will need to un-check this for each category.