According to WaBetaInfo, User does not need to leave WhatsApp to change or edit contacts, they will change and edit contacts within the app and it is a good option indeed.
The new feature is available in some devices and will be launched soon for all devices so that more people will get benefit from this method, and they indeed do not need to leave WhatsApp or switch to another app in addition to change or edit their contacts.
The new feature is called “Manage Contact” within the App to provide access to change and edit contacts. In some android mobiles there is direct option to edit contacts; the edit button is in the top right side of the contact detail. This method to edit and change contact is working in some beta testers but we consider it as an upcoming feature of WhatsApp.
The beta testers support this system because they have installed the latest beta version of WhatsApp for their Android that is the reason this new feature is available in their system.
WhatsApp is working to make it friendlier that is why in past they launched many features, and they are still launching features to make changes.
So when this feature will completely introduce you do not need to switch between apps, just tap of mange contact and then change your contact’s name within the App.
You can also add new contacts without going to the contact list, just tap on WhatsApp and add new contact with their name, in past this feature was not available so most of users use some apps to perform this task.
