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FUNCTION area：
FUNCTION area includes 9 buttons: FADE OUT, FADE IN, FREEZE, SIZE, TEST
PATTERN, BRIGHT LEVEL, ZOOM, SAVE PRESET and LOAD PRESET.
Buttons
Default operation
FADE OUT
Fade out the selected layer
FADE IN
Fade in the selected layer
FREEZE
Freeze current image
SIZE
Enter resize menu interface
TEST PATTERN
Open the test pattern interface
BRIGHT LEVEL
Open the brightness level adjustment interface
ZOOM
Open the layer zoom interface
SAVE PRESET
Enter the preset interface to save presets
LOAD PRESET
Enter the preset interface to load presets