Enable horizontal scrolling in Ubuntu
There’s a way through dconf Editor; so:
- open dconf Editor through the Dash;
- go to org > gnome > settings-daemon > peripherals > touchpad;
- check horiz-scroll-enabled, as you see in the screenshot.
Edit: Dconf Editor was pre-installed on 13.04, where I first faced the problem; but on 13.10 and 14.04 it’s easier to use gsettings, see Samuel Cavazos’s answer.
Alternative way: run this in your command line
synclient HorizTwoFingerScroll=1
Or just run
gsettings set org.gnome.settings-daemon.peripherals.touchpad horiz-scroll-enabled "true"
in a terminal