After uploading your document, you may want to add more documents or replace the original document with a new one.
To do so, click on the action menu and choose Upload Document.
If you would like to replace the original document, check the Replace Existing Document option at the bottom of the window before proceeding to choose your new document.
Select a document from your templates, Google drive, or on your computer to upload. Your document will be updated, you can rearrange the pages, and then you can proceed through your workflow as normal.