Completed move indicator

My completed move indicator disappeared . Does anybody know where the setting to get it back is. Also the last couple of weeks it's been unreliable. It wouldn't indicate that a move was made, when in fact it had and I'd be sitting there like a dummy.

I found it.
my settings-my site settings-ui options-enable doc bar. click update.
the doc bar will show on the bottom right. click the 4th icon (the bell) and itll go on.