Unfortunately i have maximized the layout window,i dont know how did i done that,but when i tried to set to layout window to small,i cant make it.here is the image so you guys can get an clear idea
http://i.imgur.com/s5EsvxD.png[/code:1k76nefa]
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you made it smaller. If you looked to the bottom-right of the program you will see that the zoom is 33% , hit + button and set it 100% then the layout will be back to normal
Guys i figured it..Thanks for help.