Overlay scroll bars can be very annoying to some Ubuntu 14.04 users. Here's how you can easily turn them off.
1. Open a terminal window.
2. Type in the following command then hit Enter.
gsettings set com.canonical.desktop.interface scrollbar-mode normal
3. Use this command to turn scroll bars back on.
gsettings reset com.canonical.desktop.interface scrollbar-mode
You can disable overlay scroll-bars, if you don't like them.More at Noobs Lab
Additional Ubuntu Resources