Hmm... next time it happens I guess.
C-h l is useful if you know what the command is called. It looks like it is whitespace-something, but i don't see a whitespace-mode.
It was more a nice key combo to know, when I want to check identations in code such as python.
Try M-x view-lossage to see the last few key presses.> Hi,
>
> I just accidentally hit some key combination that highlighted all the spaces
> on the left hand side. This is really useful, but I don't know how I did it
> :) Anyone know?
>
> thanks,
> Rich
sivaram
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