Use Case:
You can keep a part of your Advanced PDF code to a file, like PDF Header portion and have it added in file cabinet as a specific file.
Then you can invoke the same in Advanced PDF/HTML Templates using <#include File ID/> .
Benefit can be if the header is same for multiple PDF then you can keep the header in one file, if changes are made in this one file it will reflect in all the PDF using that header.
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