Combolife navigation screen

Hi all
I have a new Combolife and I have a question about the navigation screen , I cannot see how to save a location , there is no menu or save button like is suggested in the manual , I have tried all sorts and I get nowhere , any ideas ?.
Other functions seem to be ok .

 

Cracked it !

I have found that when you touch on a location a window pops up , on the top of this window is a symbol that I think is supposed to be an open book , if I touch this book then a window pops up where I can select where to save the location , simples innit !!.
I also found that the book symbol changes colour when a location has been saved and to delete the location you touch the book and remove the tick from the box .