Select Slides To Show During. In the Timing group uncheck On mouse. Browse lets you find the file you want to show.
You can also set the pen and laser pointer color. Select the SLIDE SHOW tab. And if you do so a second time you will make the ink re-appear.
This will display the slides on the entire screen.
Create or open a presentation that has more than one slide. In the context menu that appears select See All Slides Once thats selected all of your slides including hidden slides will appear in. Run a slide show. The first slide in the deck is selected.