In case your monitor supports this function, you have the possibility to rotate the screen format to a edgewise position. This capability of switching from landscape mode to portrait mode gives arranges the display more efficiently with regard to what an application might demand, i.e. less scrolling. The required software for Windows 9x/2000/XP and NT is included within the most devices' scope of supply and can be installed easily. Please follow the instructions given in the manual.
The graphics card drivers by ATI and nVidia offers this function currently support this function as well. So it's not mandatory any more to use separate piece of software.
You can also find further information in our glossary.