Go to settings>Design and their you can add a background to your account.
Click on your profile pic>Settings>Design>Change Background image
With Twitter you can add a Twitter background and you can change the colors of the background, the text, and a few other items.First you need to find a background made for Twitter at PROFILErehab.com, their twitter section is here: http://profilerehab.com/twitter_homeWhen you find the background you like, save it to your desktop.Then you need to login to twitter, click settings and then design. Here you choose Change Background and pick the background you found from your desktop. Then hit Save Changes and the background should show up. You can also change your design colors by clicking on Design colors and you can find the correct codes for each color on the PROFILErehab site next to where the background was that you picked. Here is a link to really detailed directions if you get confused: http://profilerehab.com/twitter-help/instructions (linked below)
If you want to make a twitter background, the best option is Youtube so go to Youtube and type in How to make a Twitter Header using Photoshop and there will be a tutorial on how to. Just follow that and you should be good.
Work it first on photoshop save it as .gif and then go to your settings and customize your them.
Background.
about the size of a pice of paper
yes she does, for the picture, its her background on twitter
twitbacks.com or make you own in photoshopactually, i think you'll find, that you can also ue a software called PhotoFiltre its 100% free!!
2048 px by 1707 px
Go Follow @imzjgarcia On Twitter
You cannot add facebook background. You can only add Facebook cover photo and profile picture. Background is added on Twitter.
Use any version of Photoshop to create a customized background for you Twitter page and upload it by following these steps: Go to navigation bar > Settings > Design > Upload a background image then SAVE For more details, see the attached related link.