Hi @John F thanks for posting in the community! Just to confirm are you hoping to insert a Lucidchart document that you've previously created into another Lucidchart document?

You should be able to do this by either copy/pasting the contents of your document or import the QCI template as a new page of your document by selecting Insert > Import Page. 

If you would like to change the page settings for your QCI template it may be helpful to make a copy of the document and adjust the page settings such as page format size or scaling of the contents. After this you can ad it to another document using the above methods.

Please let me know if this is not what you are looking for and I would be happy to provide more advice on how to achieve it for your use-case!