You can choose from phone numbers assigned to users, auto-receptionists, or call queues, depending on your account setup. For example, a number may be directly assigned to you, or you may have access to numbers linked to an auto-receptionist or call queue where you're listed as an operator.
💻Web
In the Make a call dialog, use the From: field to select the number you want to call from.
📱Mobile
Tap the Caller ID picker and choose the number you want to call from.