[BobCratchett]

3) What suggestions shortcuts?

This one :

Thanks a lot for 1) et 2) !

My language skills aren't the best, but that looks like the Featured window. To enable it, "Customisers" "General main menu settings" "Activate Bottom Menu (Play DVD, toggle widgets)". To access it, press down from the home screen until the bottom bar shows, then click 'Featured'

Note 1 - On my system, Suggestions is also called 'Featured'. The contents of it are the same as the Library Data Provider 'Recommended' episode and movie widgets.
Note 2 - If you get the featured customiser showing when you enter (as shown in your screenshot) you need to restart Kodi.