About 4 Corners adjustment

4 corner adjustment is typically used when the mechanical installation of the projector prevents it from pointing perpendicularly at the screen. For example, you can overshoot the screen and use 4 corner adjustment to pull your projected image corners back into the screen.

Some examples:

How to adjust the 4 corners using the coordinates

1. Select the corner to adjust (1) . Click on the radio button in front of the corner to adjust.

   

   The following selections are possible:

   • Top left
   • Bottom left
   • Top right
   • Bottom right

2. Go to 4Corners X/Y pane and enter the desired value for Corner X and Corner Y (2).

   or

   click on the up down control until the corner is on the desired position.

   X direction means moving the corner in a horizontal way.

   Y direction means moving the corner in a vertical way.

   The result of this movement will be visible in the Visualiser pane.

How to adjust the corners using the Visualiser

1. Click on a corner and drag it to the desired position.

   

   The warp screen will change to the new position. A green outline of the warp screen will be seen in the visualiser.

   The new coordinates will be indicated in the 4Corners - X/Y pane. The radio button of the adjusted corner in the Area pane will be selected.

   The following functions are available after the graph is selected first:

   • Mouse: select and drag a node to change corresponding angle and length values.

   • Keys:

     • Use LEFT/RIGHT arrows to select area.
     • Use CTRL+LEFT/RIGHT arrows to change length.
     • Use CTRL+UP/DOWN arrows to change angle.