Select Share > File from the menu bar, or click Share File on the Quick Start page. Locate the presentation file you want to share, then click Open. Use the page controls at the top of the session window to move through slides. If you are sharing a presentation created with PowerPoint 2013 or later, the page controls will not advance through transitions and animations.
If you have added notes to a shared PowerPoint presentation created with PowerPoint 2010 or earlier, they will be available to the presenter in the PowerPoint Notes panel.
For best results when sharing presentations created with PowerPoint 2013 or later, use Share Application