1、查看截图快捷键及修改方法：
系统设置（system settings）--->键盘（keyboard）--->快捷键（shortcuts）--->截图（screenshots）
2、事实上，除了截图快捷键，还有很多其他快捷键是常用的，例如：
Navigation: Switch to workspace left Ctrl+Alt+left
Switch to workspace right Ctrl+Alt+right
Switch to workspace above Ctrl+Alt+up
Switch to workspace below Ctrl+Alt+down
Move window one workspace to the left Ctrl+Alt+Shift+left
Move window one workspace to the right Ctrl+Alt+Shift+right
Move window one workspace up Ctrl+Alt+Shift+up
Move window one workspace down Ctrl+Alt+Shift+down
Window：Maximize window Ctrl+Super(即win键)+up
Minmize window Ctrl+Super(即win键)+down
启动器：启动邮件客户端 mail
