You can add a border to a PowerPoint slide by adding a rectangle shape and removing the fill color, which will give the appearance of a border.

You can insert a PDF into a PowerPoint either as an object, and then set it so it opens when you click it.

PowerPoint Add-ins are easy to add to PowerPoint on your Microsoft 365 account. Follow the below steps to add them. Click on File in the ribbon menu Select Get Add-ins and Visit the add-in store Click ...