Home
On the user chat window, click on the 3-dot menu as indicated by the arrow in the figure below.
Click View Profile, as shown in the figure below.
Find the details of the recipient’s user profile.
You can add them to your Favorites and mute notifications of their window from the options shown in the figure below.
Click the PIN icon.
You can view all the messages and attachments that were pinned across this one-to-one window.
Click the common groups icon to view the list of Common Groups you and your co-worker belong to.
Click Settings.
Select your option as indicated by the arrow in the figure below.
Note: This “delete for self” helps you to delete messages and files from your window.