When you are done, hit Shift + F5 to return the full screen presentation mode from the slide you just updated.When you find an error, simply hit Esc key to return to the normal PowerPoint editing view to fix your slide.You can then use your arrow keys to advance, spot checking your slides for errors. Hit F5 on your keyboard to start your presentation in full screen from the very first slide in your presentation.Here is how you can use a combination of all the the different keyboard shortcuts to spot check and practice your presentation in full screen before you finalize your presentation.
Hitting Esc will immediately take you out of the PowerPoint presentation mode and back to the normal editing view of your slides, on whatever slide you were last presenting. Regardless of how you start your full screen presentation, at anytime you can return the normal view in PowerPoint by hitting the Esc key on your keyboard.