I pretty much asked the entire question in the “Subject” but…
Now that I am more familiar with using GS’s Editor, I realized I created a fretboard diagram that would be better suited for an entire new collection (if that’s what new items are called). Thanks in advance!
you can imagine the collections as being like the “folders” in your computer, you can create the collections to organize the documents in your profile as if they were files.
At the moment you can’t copy and paste the content of a fretboard, but you can duplicate a fretboard and then edit the duplicate. Also you can’t copy a fretboard across documents, but the same workaround can be used where sufficient: you can duplicate and modify the entire document.