You can easily flip your entire screen with UltraMon.

PowerPoint and Word can be turned into remarkably good teleprompter software if you know how to flip them to be readable in a mirror. Using UltraMon software, there is an easy way to flip your slides automatically, without having to manually flip them in a photo editing program.  To get started, first you need to download the UltraMon software from Realtime Soft (free for 30 days).

Don’t forget to check our our UltraMon Tutorial or their website!