Additionally, if you have more than one screen, make sure you are sharing the correct screen. However, only use this as a last resort as it can take up bandwidth. In that case use the Share > Screen option to show everything on your screen (as shown in the image below). In some cases, you may not be able to share a specific application.

Refer to documentation on Screen Sharing to learn how to share a particular file/program and the available functions while sharing. User Guide Record Screen with a Button Record Video in Versatile Ways Edit Screencast in Real Time Save and Share Video Easily Simplest Interface Why. When sharing, we recommend only sharing specific applications or files and closing all unnecessary windows/applications. Sometimes, when several applications are open on your computer, if another application is overlaying what is being shared then that section of the screen can go blank in the recording. The layout of a recording changes depending on whether you are sharing content or not. When recording a webex meeting, be mindful of what is being shared.

Screen Sharing and Recording – Common Issues and Tips

Webex recording editor version 3.0