The process for adding a supplement is the same for a homepage and a document page.
1 - Open your page in Jadu
2 - Go to Page Supplements tab at the top
3 - Choose the location of the button - left, right, bottom
4 - Click "Add one now" or "Add new (location) supplement"
5 - Select the type of supplement you want to add
6 - Double check Type and Placement. You can also add an already existing supplement
7 - Title your supplement - "Department or Office name | Supplement name"
**anything before the | (pipe) is not displayed
8 - Complete the rest of the instructions specific to the supplement you are adding
9 - Save Supplement