Grass Valley XtenDD v.4.2.4 - Manual (Page 205)

3. Menu Operation
3 – 58 Operating Instructions – Rev. 1 / 7.2002
Press the associated button to store a mask signal.
Note: Please note that a signal is delayed by one frame when it passes
through the store.
If you press the associated button, you can select separately whether both fields
or a particular field is to be recalled from the store.
If as mask source a pattern is selected, two position modes are selectable:
Normal: You can position the center of the mask within the
visible picture area.
Extended: You can position the center of the mask at any place,
even outside the visible picture area.
Center: Reset the mask to the center position.
See also Position button below.
For details refer to section Introduction.
Freeze
Readout
Position Mode
Transfer Key