If you click on a feed item, it will automatically mark it as read.

Unread items are denoted with a red dot in the top right, like this:

If you click on the red dot, you'll see the feed item turn white, classing it as read.

If you hover over the top right hand corner again, you can mark the feed item as unread again.

You can see more options relating to the feed item via the ... menu as shown:

If you need more help, please let us know via live chat.

Thanks

FITR