Choose a space, right-click and select Peek.


 

When you are peeking in a space, you'll see Peek mode in the messaging area to remind you. clicking that eye icon in the compose area, will also mark the space as read and send your read receipt.

If you click on in the compose area, the space will be marked as read and send a read receipt. If you start writing a message, other users in the space will see that you are typing. If you send a message, your read receipt will be sent, and the space will be marked as read. To check who's seen your message click here.

To exit peek mode, navigate away from the space and then click back to read as normal.

Long press on a space in the spaces list, you'll see a preview window showing the most recent message sent in the space.


 

To exit peek mode, swipe down, then tap on a space to read as normal.

Peek mode uses iOS functionality, you'll notice a similar experience with other iOS apps.