This documentation will highlight the steps required to change the background of your camera in Webex Meetings and Events. This functionality does not currently exist in Webex Trainings.
The ability to upload custom virtual backgrounds will be coming in Update 40.8 (will be released on August 4, 2020)
System Requirements for Backgrounds
Please note that virtual backgrounds currently require a large amount of resources from your CPU and you may end up with the following message:
If you're unsure your system can handle this feature, please reference the system requirements documentation found here
In the preview window before joining a meeting, select Change background and then the selected change you would like to apply. This is available in Webex Meetings and Webex Unified Application (Windows on the left, Mac on the right)
Changing Your Background After Joining a Meeting
Method 3 (available in Webex Meetings): Navigate towards the top right of your video window and select the 3 dots followed by either Change Virtual Background or Camera Settings (Windows left, Mac right)