Click , select Contacts → Add contact and enter an ID (7ХХХХХХХХХХ).

Click , select “Contacts” → “Add contact” → .

Go to your chat with the user and open the information section. Click “Edit” next to the user’s name and enter a new name.

Click and select Contacts → Search.

Open a chat with the user and go to the information section. Next to “Chats in common”, you will see the number of chats in common with this user.

Open a chat with the user, go to the information section and click “Block”/“Unblock”.

Open a chat with the user and go to the information section. Click “Delete contact” in the menu options.