Optoma HD-3000 User Manual page 102

5. Press the buttons "h", "i", "f", "g" to select one edge/direction (Up, Down, left or Right)
for the edge mask. Press "Enter" when finished.
6. Use "h", "i", "f", "g" arrow keys to adjust the edge size.
7.
User can use "Mask Back Color" to fine-tune background color (gray level). Select the
item and a bar will appear, as follows. Use "f" or "g" to change each bit and use "h"or
"i" to change values. The range of values is 0~255.
Mask Background Color
HD3000 User's Guide
Professional Video Scaler and Color Management System
2 5 5
HD3000 User's Guide 38