To Box Mask a Key
Box masks can be adjusted for size, location, rotation, and multiplication.
- 
            Click Navigation Menu > Live Assist > MEs and select the ME and key that you want to set up.
            Tip: You can use the same procedure for a MiniME™ or Canvas.
 - 
            Click Mask > Box.
            

 - Click Mask Invert to invert the masked area with the unmasked area.
 - 
            Set up the mask as required.
            
- Size — adjust the size of the mask region.
 - Left Edge — adjust the position of the left edge of the mask region.
 - Right Edge — adjust the position of the right edge of the mask region.
 - Top Edge — adjust the position of the top edge of the mask region.
 - Bottom Edge — adjust the position of the bottom edge of the mask region.
 - X-Position — position the mask on the x-axis. This adjust both the left and right edges at the same time.
 - Y-Position — position the mask on the y-axis. This adjusts both the top and bottom edges at the same time.
 - Edge Softness — apply softness to the edges of the mask region.
 
Tip: You can use the Positioner to adjust the size and position of the box mask. 
