How to make a background of size using photoshop and Dreamweaver

I want to do a wallpaper for my site. Not sure what is a good size for most devices. (I am currently using photoshop and Dreamweaver) no idea what size I should use & how to make the full wallpaper size on most devices, using Dreamweaver?

ALT-Web: discoloration of loading the demo Page

The background curtain of this demo is 633px × 917px.  File size is 25,69 KB which is not bad.

The CSS code sizes the picture to fill the available display window.

{body

background: url (Curtain.jpg) Center set.

-webkit-background-size: cover;
-moz-background-size: cover;
-o-background-size: cover;
background-size: cover;
}

Nancy O.

Tags: Dreamweaver

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