Objects align to face camera

I’m sure I’ve seen this before, but can’t for the life of me remember how it’s done…

I basically need to set objects up in a scene to always face the camera. I’ve got a scene of a map with place markers above the land. The camera will be moving around, getting in close, then moving up for a bird’s eye view. I’ll need the signs, which will be quite thin rectangular polygons, to always face the camera, rotating at their pivot point to update automatically.

If anyone could tell me how this is done I’d be very grateful.

Thanks,
Stephen.

Oh, never mind, got it, select the object, then the camera, then ctrl-t, selecting the first option.