In the side panel, under the "Select Add-ons" heading click on Props to select a prop and use it in your 3d creation. Props when added to a scene, appear near the origin. Navigate to the origin in the scene and then select the prop. You may resize the prop from the Setting --> Scene config ---> Object properties
To change the background image of the environment go to side panel, click on Images and select Background Image to use it in your 3d creation.
In the side panel, navigate to "Select Add-ons" and click on Videos to select a video from the library and use it in your 3d creation. You may upload your own videos in the "Uploads" section
