This one is easy. It means being seen when they walk in the door/log on/crash into the room while juggling weasels on a unicycle, and still being there when they leave/log off/rappel out of a window. If you can spare a handful of extra minutes, you don't even need to put much effort into this one. Have a coffee. Stare meaningfully at your monitor and think about silly things. Just allow yourself to be seen. An employee at their desk is worth two in the imagination, after all.