well, when i was first used windows 7, i saw that the desktop picture changed smoothly to another picture . But now, i saw that it's instantly changed to the next picture! Why is it? I prefer it smoothly changes. Please help me..

My Computer
At a glance
Windows 7 32-bit
- OS
- Windows 7 32-bit
- Screen Resolution
- 1286 x 1024
- Mouse
- Razer Orochi Gaming