Scrolling in Terminal when program is opened in MacOS Sierra After I upgraded to Sierra from Mavericks I noticed that when I open something in Terminal with for example less or vi and I want to scroll back to see previous lines the scrolling happens inside the programs. How can I change it back to 'just scroll'?

Thanks!
You can scroll the screen while holding fn or Shift ⇧ key. 

You can disable this completly by unthicking:

Terminal Preferences → Profiles → Keyboard → Scroll Alternate Screen.