It is very important to notice that in case you have made any mistake, you can roll back to the previous state of the project by clicking the shortcut Ctrl + Z, a standard in every WindowsTM application. You can do the same also selecting the UNDO command in the upper-left corner of the Application window, as you can see in the next image.
The opposite of UNDO is REDO (the specular button) whose shortcut is Ctrl + Y.
This article is valid for DomuS3D® 2017 and later versions