We will be making a copy of the box you have created that will later be merged. To make a copy use your mouse and select the box you created by clicking on it, you will know its selected once it’s outlined in green.
Once the box is selected using your keyboard Press CTRL-C then CRTL-D to create a copy
Once you create your copy some modify options will appear use the arrows drag the copied box out and move it.
You now have 2 copies of your shelled-out box!
BEFORE PROCEEDING SAVE YOUR PROGRESS!
Go to the APPLICATION MENU in the top left corner, then select SAVE and SAVE TO COMPUTER