Can I make a presentation using Grafio and External Projector, Screen or TV ?

Absolutely! Grafio is meant to be used as a diagram editor and presentational tool.

All you need is to plug a VGA connector to your iPad and a VGA icon will show up on the toolbar, when clicked it sends output to the external video device of your choice.

The output will show only your canvas (no buttons and toolbars) so it looks very professional. You can use it in business meetings, lectures, etc.