My screen has changed size?

can anyone tell me how to fix it thxMy screen has changed size?
Alter your screen display settings

You can access your Display settings by right-clicking anywhere on the Desktop and then choosing Properties. You can also access these settings through the Appearance and Themes and Display icon in Control Panel.



You will now see the Display Properties window which has display settings arranged under five tabs - Themes, Desktop, Screen Saver, Appearance and Settings.

Click on the drop-down arrow buttons to choose different settings, which will be previewed for you in the picture above the options.



The Font size option is useful if you find text too small to read - set to Large Fonts or Extra Large Fonts as required. Click on Advanced to choose size and colour settings for individual screen items such as windows, borders, icons and menus.



Settings

Under this tab you can set screen resolution and colour quality.



Resolution determines the number of pixels across and down the screen that are used to make up the display. The higher the setting, the more detailed your display.



A higher resolution gives you a larger screen area to work with, but if you find text and icons are now too small you may need to increase font size and use larger icons to compensate.



You can only go up to the highest resolution that your monitor can support. Experiment to find a resolution you are comfortable with.My screen has changed size?
Right click on empty area of your Desktop and click on settings





For Vista ight click then click on Personalize, then click on Display settings



Also, check the bottom right corner of your Desktop and make sure it is set at 100%
at the right nad corner of ur screen there is a magnifying glass with a plus sign in it click that a couple of times
right click on a clear space on your desktop and click properties then settings and set it to the size you require usually 1024 768

hope this helps
right click on the desktop go to property

then go to setting

in case of xp

for vista

do to personalize

the select the resolution what u want i think the generality

the resolution of 1024by768

is good

or prefer the 1152by864 is also the better one