can anyone tell me how to change display settings in "dxdiag"??? my motherboard is acer !!?

Answer 1

You don't change display settings in DXDIAG. DXDIAG is a diagnostic tool of DirectX to show you what kind of graphical hardware you have on your system. To change display settings, right click your desktop, and go to Properties. To change resolution and color, click on the Settings tab at the top. To change your graphic card settings, go to the Settings tab at the top, and click on the Advanced button near the bottom. Go into your graphic card tab and change away.

Answer 2

In the Run Command type that, dxdiag, wait, a box window will open showing you the Direct X settings that are on your PC. From there its up to you to find out what is best for your hardware and software.What you are looking for is which DirectX Engine you are running, probably DX9c, maybe better. To change the settings you can do that in Control Panel>Display> Advanced> then goof around with hardware acceleration and 3d rendering until it is set the way you like.
http://forums.ubi.com/eve/forums/a/tpc/f/327106611/m/135102711/p/4
http://www.windowskb.com/Uwe/Forum.aspx/windowsxp/104046/can-t-run-directx-diag
http://www.pcbanter.net/archive/index.php/t-619953.html
For Acer:
http://www.realtimesoft.com/multimon/forum/messages.asp?Topic=1325
http://www.lafn.org/webconnect/mentor/startup/MINDEX.HTM
http://forums.windrivers.com/archive/index.php/t-11301.html
http://www.windrivers.com/alpha/video.htm
Hope that helps.