This doesn't work on all systems, but try <control><alt> and then the Down, Left or Right Arrow. The down arrow flips the screen image upside down. To flip it back just use <control><alt> and the Up arrow. The best is to use the down arrow and then flip their monitor upside down. This doesn't always work, but when it does it is great. You also may be able to enable it if you want to look around. Try Control Panel, Display, Settings, and then look around from there.