Open the Messages app on your iPhone, iPad, or Mac
Sign in with your Apple ID if prompted
Make sure iMessage is turned on in Settings
Tap the compose button to start a new message
Enter a contact name, phone number, or email address
Type your message in the text field
Tap send
Use blue bubbles to confirm iMessage is being used
Add photos, videos, or files using the attachment button
Send voice messages by holding the audio button
Use reactions by pressing and holding a message
Edit or delete a sent message if available
Turn on read receipts if you want to share them
Use group chats to message multiple people
Sync messages across Apple devices with iCloud if desired