Click the Add Addenda blue button in the top left corner of the window.
Click the + sign to select addenda on your hard drive to add. Select an issue Date here to apply to all addenda included in this batch. (You can change individual issue dates after they are uploaded)
Browse your hard drive to choose the file.
After uploaded, click Done.
BEST PRACTICE: You can upload a single .pdf file for each addendum. For this reason, it is advisable to upload the narrative only which will identify drawings that you save in the filing cabinet. This is also preferable, so the added drawings will enumerate on contracts