You can share content to your device whether you're in a call or not. Local sharing is available for both Webex registered and on-premises registered devices.
The Cisco Webex Meetings app must be connected to the device in order for you to share wirelessly. Both the Windows and Mac apps can connect to your device as long as you are in the same room.
Wireless Share with the Cisco Webex Meetings App
When your desktop app is connected to a device, click the device name at the bottom of the window. Then click Share on Device.
Select whether you want to share the entire screen or only one of the open applications.
To stop sharing, click the Stop Sharing button at the top of your laptop screen.