[SOLVED] Pan-Scan problem

[markweng]

When playing a 16:9 movie at full screen mode, i see 2 black borders on my 4:3 display. i feel the image is a little small, so i press "+" to enlarge it. Yes, the image is bigger but the border is kept the same? The border will be adjusted correctly after left-clicking or moving the pointer to the buttom. It is not convenient! Or, is it only the case on me? i ever try MPC by pressing "9", the border will be adjusted right away - no more operation needed.