Changing the Ubuntu taskbar hide speed
   
When using Ubuntu, you can set the taskbar to AutoHide so that it will disappear
until you hover over it. However, a common complaint is that the taskbar hides
and unhides too slowly. Here is how to fix that problem.
   
First, open the Terminal by going to Applications > Accessories > Terminal.
   

   
Next, type gconf-editor and press Enter.
   

   
In the Configuration Editor, navigate to apps > panel > toplevels >
bottom_panel_screen0.
   

   
Right-click in the window on the right, and click New Key.
   

   
In the input for Name, type in animation_speed. In the input for Type, select
String. In the input for Value, put fast.
   

   
Now click Ok and you are done! You have just set a faster animation speed for
the bottom taskbar. You can do the same for the top if you select
top_panel_screen0 on the left.