If you got it from Google then you need to enlarge it but otherwise you need to tile it or center it. The only reason pictures appear blurred when they are stretched on your background is because the picture you have chosen is small. You have to chose a picture with a higher resoloution. Pictures that are over 200 pixels are the best.
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you should set your screen settings. just right click on desktop background and in settings you can set.
Right click on a blank space on your desktop and choose backgrounds. Then you can choose from allot of different backgrounds including solid colors. You can choose browse you pick your own background. Or right click on nay image file and click set as desktop wallpaper
The desktop background on a PC will be blurred if it is at a much lower resolution than the screen is currently set to. This causes the image to be stretched and distorts it.
If you find any online image, you can right click on a Windows computer and select set as desktop background. That is the best way to get free images for your background.
You can easily add blur using depth of Field in Guided Edit or from Filter > Blur > Gaussian Blur, Motion Blur... When using blur filter from Filter menu first duplicate layer with image, apply blur filter then create layer mask and use Gradient Tool on layer mask (set foreground background colors to black/white) to restrict blur only to some areas of the image.
It sounds like your desktop wallpaper has been set to 'tile'. Go to 'Control panel and click 'display' and under this there should be a tab that says 'Appearance'. You can set the wallpaper to what you want here, from centered to stretched to tiled, etc.
Steps to Create Windows 8 Custom Theme Pack:First of all, right-click on your Windows 8 desktop and select the Personalize option. Personalize option gives you access to customize Windows 8 appearance.In the Personalization window, you have to set Desktop icons, Mouse pointers, Desktop backgrounds, Sounds and Screen saver for your custom theme pack.
in your images
Usually in desktop settings.
A program that uses a sprite/set that sits/roams/ect on your desktop.
Right click and click on save as desktop background.