Text Rotation in openglcd library

Hey everyone;
I am beginner at arduino programming, and i have a problem with rotation of text when using openglcd.
I want to use 90degree rotated lcd. But i dont find any function to do that.
Thanks for your helps.

For that you need to look at commands for LCD.
go through the following link to get an idea:

http://images.google.de/imgres?imgurl=http%3A%2F%2Fwww.microcontroller-project.com%2Fuploads%2F2%2F2%2F1%2F5%2F22159166%2F1221676_orig.jpg&imgrefurl=http%3A%2F%2Fwww.microcontroller-project.com%2Fdisplaying-text-on-tft-lcd.html&h=800&w=600&tbnid=JGTm8QoJERnYhM%3A&docid=HT4lWfDNTWSEzM&ei=k3LyVoz0LYbBOavXlMAO&tbm=isch&iact=rc&uact=3&dur=481&page=1&start=0&ndsp=42&ved=0ahUKEwjMibymz9bLAhWGYA4KHasrBegQrQMIJDAC