The editing and deleting feature will be applied immediately, and it is not reversible.
You can edit messages written in chat rooms and delete attachments.
Only the author can edit the message, and (edited) will be displayed on the message.
Hover over the message and click the more [...] icon, then select [edit].
Long-tap the message you wish to edit and choose [edit].
You can delete a message in your chat.
Only the author or the team admin can delete a message.
Hover over the message and click the more [...] icon, then select [delete].
Long-tap the message you wish to delete and choose [delete].
Edit and delete deadlines may be limited by team admin settings.
If you cannot edit or delete because of the deadline, ask your team admin to change the settings!