Constant	Description
Contain	The picture proportionality is maintained. The entire picture is displayed and stretched for best fit.
Cover	The picture proportionality is maintained. The entire PictureBox height and width is filled.
Fill	The picture is stretched to fit both the width and height of the PictureBox. Proportionality of the picture is not maintained.
Normal	The picture is displayed at its original size. No attempt is made to fit the picture to the size of the PictureBox.
Repeat	The picture is displayed at its original size and repeated. The entire PictureBox height and width is filled.