Once within the Virtual Stage as a Host, select the Overlays tab within the offstage section at the bottom.
Within the Overlays section, you have the option to upload a custom image or add a text overlay.
Custom Image
Select the +Upload Image button and select the image(s) you would like to use as a graphic overlay. Images should have an aspect ratio of 16:9.
Once done, select the image you want to display and then select Show Overlay.*
Text Overlay
Enter your overlay title, subtitle, and background/text colors.
Once done, select Show Overlay*.
Once you would like to remove the overlay from the stage, select Hide Overlay.
One thing to keep in mind - once an overlay is published onstage, it will display over the layout of your Hosts and Speakers regardless if you are on grid or speaker mode!
Note: you can preview your graphic and text overlay within the Preview & Publish box in the right section of the Overlay tab prior to showing onstage.