When you close enough so you can see them and they can see you, press these buttons: Enter, /, s, h, e, y, Space, i, n, v, i, t, e, Space, m, e, Space, p, l, z, Enter.
When you can't see them but you know they're in the zone you're in, press these: Enter, /, z, h, e, y, Space, t, h, e, r, e, Space, i, ', m, Space, l, o, o, k, i, n, g, Space, f, o, r, Space, g, r, o, u, p, Enter.