Limit distractions and maintain privacy in your current surroundings by using a virtual background to blur or replace your background during your meeting, event, or training session. Click on the link below for the steps for using virtual backgrounds.
Note: You must select the virtual background before you start the meeting.
https://help.webex.com/en-us/80jduab/Use-a-Virtual-Background-in-Webex-Meetings-Events-and-Training