Kobo Aura (Walmart version) Sleep Screen Text

I've got a new Walmart version of the Kobo Aura.

I like it. One thing I would like to see different is that when it is asleep it says 'Sleeping' at the top of the screen and shows the cover of the current open book. I would like to see a text line showing my name & contact info where it says 'Sleeping' so whoever finds it when I leave it somewhere can call me. Can this be done & where would I find the info about doing it.

Thanks.