在Federa 15 Gnome3下compiz已經無法使用，以前使用的快捷鍵已經無法使用，這裡可以同樣設置，達到視覺效果和實用效果的雙重效果
1 設置已有快捷鍵
System-tools>>System Settings
2 設置截屏快捷鍵
補充一下：抓圖Take Screenshot的參數
–window Takes a screenshot of the window that has focus.
–delay=seconds Takes a screenshot after the specified number of seconds,and displays the Save Screenshot dialog.Use the Save Screenshot dialog to savethe screenshot.
–include-border
Takes a screenshot including the border of the window.
–remove-border
Takes a screenshot without the border of the window.
–border-effect=shadow
Takes a screenshot and adds a shadow bevel effect around it.
–border-effect=border
Takes a screenshot and adds a border effect around it.
–interactive
Opens a window that lets you set options before taking the screenshot.
–help
Displays the options for the command.
比如我們要實現
–window 抓取當前激活窗口
–interactive 先顯示抓圖軟件界面，再抓圖。
–delay=2 延時2秒鐘後抓取
命令：gnome-screenshot –window –interactive –delay=2
該命令可以在終端窗口中運行。大家可以根據需要自行修改。
