Click the Upload button on the toolbar.
The upload modal opens on the left. Click Select File.
Choose the file from your computer and click "Open". Alternatively, you can drag and drop files straight from your computer on the whiteboard as well.
We also support uploading from other sources including:
Image search: Use the built-in image library to import stock images
Camera: Take a photo instantly using your camera / webcam
Files: Import files from your organization's shared files library
Google Drive / OneDrive: Import from Google Drive or OneDrive directly from "apps"