PDF in Altium 365 Web Viewer
You can view PDF documents page by page directly from Altium 365 by opening a release package. You don't need to download the document and view it in an external PDF viewer. The feature is available through the Altium 365 Workspace browser interface.
Switch to the Releases view for the required project (left-hand side menu).
To open a release package for viewing, click the Open button. Alternatively, click the option and choose what to view—either the complete release package or a specific assembly (variant). A project release is presented in a new browser tab.
Open the release.
Choose the PDF you want to view. Click it, and you will view the PDF in Altium 365.
Info Icon : You will find various controls for navigating the PDF.
Info Icon: You will find the PDF document data containing information about the PDF, like the PDF version, the author, and number of pages.
You can use page thumbnails to jump quickly to a selected page or adjust the page's view.
But if you still want to download the PDF locally, just click the download icon present next to the PDF name, and it will be saved in your downloads folder.