You get to the design area where you change the background in colors by first clicking on your icon image in the top right and choosing "Settings." Then, on the left, you choose "Design," about half-way down.
You can choose from premade options here or load up your own background JPG.
If you do create your own JPG, you generally want the design just on the left hand column. If you have a "busy" image that takes up the entire background of the page, it will be hard to see. People tend to tune out confusing images. If you focus on that left hand column, which is generally 100% clear and visible, you get the most bang for the buck.
I go with nature themes on my lisashea and lisashea_hivol accounts because I love nature. That helps to show more about my personality. On my BellaOnline account, I have the name and logo to help continue the branding efforts there.
Some people suggest you put actual text in that space with URLs. Remember, that is a GRAPHIC so people can't even cut and paste that information. They would have to hand type whatever letters you put in there. In comparison your bio information on the right side is actual text and can be cut and paste. I would most definitely recommend you put any URLs in that right hand bio, so it is useful.
Still, if you wanted to have some text which did NOT need to be clicked on - for example if you wanted to put a more lengthy bio about what you are about, your background and interests, you could certainly add that information "in a graphic" on the left hand side.
No matter what graphic you choose to put up, make sure it is optimized for good web viewing and works in a variety of browser resolutions. Try changing your own monitor's resolution to a variety of sizes - 600x800, 1024x768 and so on - to make sure your page looks nice for all sorts of readers.
Building Traffic for your Twitter Account
Followers and Twitter's Value
What is a Twitter Hashtag?
Maintaining Multiple Twitter Accounts
Choosing a Twitter Icon
Choosing a Twitter Background
What is a Twitter Hashtag?
Twitter for Authors
Twitter Promotion Tips
Twitter Next Step
Twitter 2000 Follower Limit
TweetDeck - Free App for Twitter
TrueTwit - Prevent Twitter Spam
Tweepi - Manage your Followers
ManageFlitter - Follow and Unfollow
FollowerFilter - Great Free Follower Management Tools
Twitter Template Designs
Spring Twitter Template Design
Summer Twitter Template Design
Autumn Twitter Template Design
Winter Twitter Template Design
BellaOnline Twitter Template Design
Taking on Twitter by Kathi Browne
Twitter Business and Pleasure by Erwin Calamer
Lisa's Twitter Feeds
LisaLowCarb Twitter Profile Follow @LisaLowCarb
LisaSheaAuthor Twitter Profile Follow @LisaSheaAuthor
LisaSheaArtist Twitter Profile Follow @LisaSheaArtist
LisaVideoGames Twitter Profile Follow @LisaVideoGames
WineIntro Twitter Profile Follow @WineIntro
BellaOnline Twitter Profile Follow @BellaOnline
LisaShea Twitter Profile Follow @lisashea
SuttonMass Twitter Profile Follow @SuttonMass
RomanceClass Twitter Profile Follow @RomanceClass
MusedReview Twitter Profile Follow @MusedReview
LisaSheaOrigami Twitter Profile Follow @LisaSheaOrigami
WeddingsLisa Twitter Profile Follow @WeddingsLisa
ASPIsFun Twitter Profile Follow @ASPIsFun
EnjoyMA Twitter Profile Follow @EnjoyMAWebsite
BookKitten Twitter Profile Follow @BookKittenTweet
BostonWritersM Twitter Profile Follow @BostonWritersM
BVArtAssoc Twitter Profile Follow @BVArtAssoc
FarFromEdenBand Twitter Profile Follow @FarFromEdenBand
FreeBargainBook Twitter Profile Follow @FreeBargainBook
LisaShea_HiVol Twitter Profile Follow @LisaShea_HiVol
OrganizeIdeas Twitter Profile Follow @OrganizeIdeas
PermaFreeBooks Twitter Profile Follow @PermaFreeBooks
Social Networking Websites
Marketing your Small Business
Working from Home