Ah, yes, we still haven't resurrected our "append" system. That's a nice reminder!

In the meantime, you can
COPY elements (lines, curves, etc...) out of one project, then open the other project and
PASTE them in there again.
Cut, Copy and Paste out of Menu/Edit (or standard keyboard shortcuts) work with the system's "Clipboard" and will enable you to not only bring elements from one project into another, but would also work, if you had two White Rabbit CADs open.
However, this does not work with patternpieces! We may add that at some point, too, but it's kind of a source for potential chaos. We shall see!
Also, watch out, in case you paste an element and somehow don't see it, it may be out of sight. Just zoom out in case auto-zoom somehow wasn't catching it.
