Grass Valley Imagestore 750 v.2.0.1 - Manual (Page 59)

Imagestore 750 User Manual Front Panel Operations
Miranda Technologies Inc. Page 59
Left
Selects the left-most extent of the mask. Value ranges from 0 to Right.
Right
Selects the right-most extent of the mask. Value ranges from Left to the
width of the active picture (which changes depending upon the video
standard).
Top
Selects the top-most extent of the mask. Value ranges from 0 to Bottom.
Bottom
Selects the bottom-most extent of the mask. Value ranges from Top to the
height of the active picture (which changes depending upon the video
standard).