One of the features in Windows 7 that I absolutely love is desktop themes. This is where you can set several different images as your desktop background. You can even designate how much time elapses before flipping to the next picture. It certainly offers up a livelier alternative to those static desktop backgrounds available in XP.
Before you create your own theme, there are a few considerations. First, will you be sharing your theme with other people? If so, you are going to want to map out your images by size. This includes image resolution as well as image size. You don’t want to use high resolution images as this will only make the size of the final file too large to share via email. For example, I have 10 images I’d like to include and each image is 5MB each. After the math I’m looking at a theme file size of 50+MB. Most email servers will not accept file attachments over 10-20MB. It can become problematic, so it requires thought. You can choose to decrease by resolution, I recommend 72dpi. Or by pixel size or a combination of both will help decrease file size. Pixel limits vary upon devices being used. I’ve found a good average to go by is 1024px.
Landscape: height =1024 Portrait: width=1024
To get started, create a new folder in your Pictures folder. To do so, right-click in the Pictures window and select New, then Folder. Name your Folder. Next copy pictures you want to include in your desktop theme into that new folder. I recommend a copy here as you would not want to lose or perhaps, misplace the original picture file. Once the pictures have been copied into your folder, then I suggest making the image size adjustments. *if you want to decrease the file size for sharing* This way everything is contained in that folder. When that step has been completed, you are ready to add the folder as a desktop theme.
When you are finished, select Save Changes. Upon saving your changes your desktop background will be set and the Personalization window still shows. You should notice under My Themes you will have Unsaved Theme, to save the unsaved theme, simply right-click. It’s that easy! Share with your friends… here is mine. Enjoy!