To fix this issue got compiz settings manager “Window Decoration “ in “Effects” Section and also enable “Move Window” option in “Window Management”
Get compiz fusion installed in your system…Enable Enhanced Desktop zoom effect…chenage hotkeys according to your like i configured so that ctrl+mousebutton1 gives zoom in and shft+mousebutton1 gives me zoom out……
Select compiz settings manager and enable enhanced desktop zoom
select the hotkeys
The above picture shows desktop before zooming…..
This is after zooming….