Ubuntu 13.04 Raring Ringtail will no longer display an option to enable or disable horizontal scrolling in Mouse and Touchpad settings.
Follow these steps if you want to enable the sidebar scrolling feature on Ubuntu 13.04. In the earlier release of Ubuntu we can enable the horizontal scrolling feature directly from the "Mouse and Touchpad" settings window. Unfortunately, this feature is no longer available to enable directly from the settings window.
If you don't have installed "dconf-editor" then install it by typing the following command in Terminal.
sudo apt-get install dconf-editor
Open it by typing dconf-editor in Terminal.
Goto org –> gnome –> settings-daemon –> peripherals –> touchpad
Enable the checkbox "horiz-scroll-enabled" to enable Horizontal scrolling.
Also enable the checkbox "natural-scroll" to enable Natural scrolling.
Update: If you are not able to scroll the Unity sidebar with these settings, dont worry..!! Hold the Alt key and scroll. Enjoy..!!!
