Set Background Image In Zoom. Fallback color background-image. Click Settings or My Meeting Settings in the left panel.
Then the child can fill the parent using width. Now click on Check for Updates. In the Room Settings tab navigate to the Room Setup section.
Click Edit next to the room floor or location depending on where you want the background to be applied.
Scroll down to the Virtual Background header in the right panel. In the Zoom app click your profile in the top right corner and click Settings. You can either choose Zooms default background options or if you want to upload a photo to use as your background on the same Virtual. Click Choose Virtual Background and select any of your backgrounds.