Enable workspaces on Ubuntu 14.04

By default the workspaces feature is not enable on Ubuntu 14.04,  hence you can use follow steps to enable it:

1. Press Windows Key>> Type "appearance" and click Appearance icon
2. Click "Behaviour" tab
3. Check "Enable workspaces" and "Add show desktop icon to the launcher"

[Reference]

• How to use different workspaces on Ubuntu 14.04?