careless

(It's probably too late now, but) I think there is a way to undo changes.

JaimieVeale (talk)04:19, 6 August 2013

Actually there is a way to review the changes been made. by clicking on the change been made (the contribution link) through the history button, and click on the change someone made on the relative topic, and there is a button called 'diff' and we can compare the former & later version.

YuchengLiang (talk)04:48, 6 August 2013