TOPIC:

The training guide discusses creating a building (Porch in this case) and then adding it to a building that is in another project. The Training Guide quotes:
"Normally such a porch would be a separate building project to an existing building and so we will
create a new project. On completion the porch can then be added into any existing or future project."

How do you do copy from one project to another please? Are there any tips apart from the basic instruction. Ie pitfalls and how to avoid them?