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The Drawings button will return you to whichever to the drawing page you were last onfrom which you opened the current file.
Inbox Folder
If you click the Inbox folder on the Documents page you will be taken to the Inbox page.
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The Inbox page list all of the files you have opened and uploaded from your email sources.
Documents
The Documents button will return you to the Documents page.
Edit List
The Edit List button allows you to edit the file list.
