Moegia, Thank you, I just downloaded an old version of Video card driver, it didn't solve the problem. it is not tiny, and it can't zoom out. I have reset the computer to the manufacturing's setting and re-installed the X16. however it doesn't work.
The first time I had the problem is last Friday Morning, I reported to the technical support center, and later It seems works normal after I did system restore to 2 days back than that day. on Friday evening I am running on a walkthrough, however it stopped and later I can't get the 3d Rendering or elevation back. I was trying to go back to an earlier data, but I failed to restore the system to an earlier date.