In Sublime3 (Windows):
Some users may get an inverted screen using the Ctrl+Alt+▲ in windows. To Solve this go to
Preferences->Key Bindings-User
And add these two lines at the end of the file just before closing brackets:
{ "keys": ["ctrl+alt+pageup"], "command": "select_lines", "args": {"forward": false} },
{ "keys": ["ctrl+alt+pagedown"], "command": "select_lines", "args": {"forward": true} }
Or use your own keys.