You can check the activity tab in the sidebar or activity app.
It will show a history of who did what with the file.
On 07.07.2016 16:41, Tom Fernandes wrote:
> Hi everybody,
> at work we share files a lot with other OC-users. That's what it's all
> about, right? :-)
> When different users write to a file, it is - AFAICS - impossible to see
> who was the last user who modified it.
> Is there a way / an app to show this information?
> Warm regards and thanks for the good work,
> User mailing list
> [hidden email] > http://mailman.owncloud.org/mailman/listinfo/user