If you want to keep a conversation but not the entire thread, you can delete the parts you don’t want. You can also delete entire conversations from the Messages list.
Tap Edit. Tap the circles along the left side to select the parts of the conversation you want to delete, then tap Delete. When you’re finished, tap Done.
Tap Edit, then tap Clear All. Tap Clear Conversation to confirm.
Select a conversation, then tap Edit. Tap the circles on the left side of the screen to select the parts of the conversation you want to include, then tap Forward, enter one or more recipients, and tap Send.
Tap Edit, then tap
next to the conversation and tap Delete. You can also swipe left or right over the conversation and tap Delete.
