Click the overflow icon (3 dots) > click Invite to BBM > Choose the method by which to invite a contact > Enter any info as needed. > When the contact accepts your request they will be added to your contact list
To start a new chat, tap the BBM icon in the top right corner (the one with the + sign) > Search for or choose a contact from the list > Tap the contact, enter your message and choose Send
To start a multiperson chat with more than one contact, click the overflow icon (3 dots) > tap Start Multiperson Chat > Enter the contacts to which you want to send your message > Enter you message and tap Send
To access the settings menu, tap the overflow icon (3 dots) then choose Settings > Here you can change things such as notification tone, contact list layout, update options, chat history and more
To send a broadcast message to all of your contacts, tap the overflow icon (3 dots) then choose Broadcast Message. Enter your message and tap Send.
To quickly view your contacts list, tap the Contacts icon