Samsung SDP-9000DXR User Manual page 34

Adjusting your image with GUI
3x3 Multi
Allow to see all the images in the memory (up to 8 frames) on one screen.
Click [3x3 Multi] menu with the left mouse button, 9 divide mode is activated and
GUI menu disappeared. If you click the image number on screen, select image will be expanded to full screen
and GUI menu is appeared on the screen.
To Release 3x3 Multi mode, click the center image.
Cancel
Allow to stop current image processing function and return to normal mode.
Click [Cancel] menu with the left mouse button, all digital function is released.