Add option to change the slide background (ex. to a different colour or uploading an image similar to the google slides background option) instead of the time consuming current method of having to upload an image and resize it to fit then lock it in place for each slide? It would be amazing to be able to upload my current google slide images as a background to a Lumio slide instead of having to insert and resize/lock the image (especially when it doesn't fit the slide format in Lumio) or to change the background slide colour to create more accessible lessons for my students with sight/vision difficulties.