If you click over an object with the left mouse button when you are in the layout window, a group of tooltip menu buttons (related to that object) will appear, as you can see in this image.
The rotation button () allows you to start rotating the pointed object.
Click ESC keyboard button if you want to exit this command.
If you have done the wrong modification on the element, click Ctrl + Z (UNDO) keyboard buttons together in order to roll back the last operation.
This article is valid for DomuS3D® 2017 and later versions