Samsung Galaxy Note 4 User Manual page 116

Delete Messages
You can delete messages.
1. From the Home screen, tap
2. Tap a conversation to display it.
3. Touch and hold the message you want to delete,
and then tap Delete messages on the pop-up
menu. Follow the prompts to confirm the deletion.
Delete Conversations
You can delete all the messages you've exchanged
with another person.
1. From the Home screen, tap
2. Touch and hold a conversation you want to delete
and tap Delete Conversation > Delete.
Note: Locked messages will not be deleted unless you
select Delete locked messages before confirming the
deletion.
Applications
Apps >
Apps >
106
Protect a Message from Deletion
You can lock a message so that it will not be
deleted even if you delete the other messages in the
conversation.
1. From the Home screen, tap
2. Tap a conversation to display it.
3. Touch and hold the message that you want to lock,
and then tap Lock message on the pop-up menu.
A lock icon displays on the message.
Apps >
Message+