To open a Microsoft PowerPoint (PPT) file without downloading it to your computer:
- Open the message containing an attachment.
- Click View as slideshow at the bottom of the message.
This will open your slides in a new browser window. You can navigate between slides by clicking the left and right arrow buttons at the top of the screen, or by choosing a specific slide from the dropdown menu in the upper right corner of the screen. You can also zoom in and out, select text to copy and paste, and print the presentation or TIFF file as a PDF document.