If you change computers often, the Sync settings allow you to keep TweetDeck looking the way that works best for you!
To open the options, look for the wrench button at the top right.
That will bring up the settings window. Select Sync from the left hand side.
Enter the email and password associated with your TweetDeck account and hit Verify account. You get the columns associated with your account loaded into the user interface.
If you want to sync with another TweetDeck account, first hit remove account and then use the verify function.
That’s all the Sync settings, go back to the Settings list to find the other sections!