Concerns for cyber-bullying, after Apple shares plans to offer a new delete and edit feature in iMessage.

It's part of its upcoming software upgrades, and will give users 15 minutes to make changes after sending a message.

Former NetSafe Chair Rick Shera told Heather du Plessis-Allan the easiest way to ensure users retain proof of messages they've received is to screenshot them.

He says it's the best move for anyone suffering from upsetting or worrying activities via iMessage.

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