In some scripts, uploading a document or file is part of the script. If this is the case, depending on the script, you will actively be asked to upload a document.
Alternatively, if you wish to change or upload a document for presentation purposes:
1. Click on the ‘Upload Document’ icon
2. A popup appears. Click ‘Browse’ and choose the document you wish to present
3. Activate the document in the list by clicking on it and close the popup