This article shows you how to select multiple furniture objects so that you can manipulate them simultaneously
If you want to select multiple furniture objects in the Editor, press and hold the Shift key on your keyboard. While holding down Shift, click all the furniture objects you want to select. Once you've selected all the furniture objects you want, you can release the Shift key on your keyboard.
You can then proceed to move and rotate your selection, delete it, or group the selected objects from the “Selected Items” menu on the right side of the page. You can also group or delete selected objects using the context menu by right-clicking on one of the selected objects.