How do I stop my iPhone or iPod touch from rotating the screen?
To lock the document display orientation, rotate your iPhone or iPod touch to the desired orientation, wait for the display to rotate and then shake your iPhone or iPod touch. MyPDFs will display the rotation lock graphic for severals seconds to let you know that rotation is locked. To unlock the document display rotation, shake your iPhone or iPod touch again and MyPDFs will display its rotation unlock graphic.