Grass Valley XtenDD v.4.2.4 - Manual (Page 259)

3. Menu Operation
3 – 112 Operating Instructions – Rev. 1 / 7.2002
For details refer to section Introduction.
Selecting the the requested Texture Source.
After selection the controls above change to the respective mode:
Texture Source = Key Texture Source = Pattern
Shows basic pattern
even of User Wipes
Selecting freeze mode for the Texture Store.
Selecting the respective field or frame for readout:
Menu Lock
Texture Source
Freeze
Readout