On the sidebar menu, click on Settings
To create a new account and add an additional number to text from, click the CREATE ACCOUNT button in the top right corner of the window
Once you click CREATE ACCOUNT a pop-up window will open where you will type the name for the new account and area code
Once you type in the area code you will be given a list of new numbers from which you can choose for your new account
Once you have selected your number you just need to enter your billing information and you’re all set!