If you have contacted RaiseDonors and have access to multiple accounts, you can easily switch between clients by clicking the small "gear" in the top right corner, and then click on 'change account'. Now a modal window appears allowing you to switch accounts.
FYI, When viewing client #1's account, any links you have from emails or bookmarks will load data from client #1. If you need to view any data in client #2's account, you'll have to switch accounts.
It's best to NOT change accounts when viewing a specific donation or donor account. Reason being, that specific "ID" may not exist in the account you are switching to. To be safe, be sure you are on the dashboard before switching accounts.