I have recently upgraded to AutoCAD 2017 from AutoCAD LT 2015. In 2015 if I used the shortcut: Command Tilde, to easily switch between the different autoCAD files I had open (This same shortcut works for most other programs on my computer such as Photoshop, Acrobat, Illustrator) However 2017 doesn't have this same shortcut. Does anyone know of a similar short cut or a way edit the shortcuts to include this? 

Thank you for your help.