Grass Valley Zodiak v.6.0 Mar 15 2006 - Manual (Page 261)

Zodiak — User Manual 261
E-MEM Menus
Source Hold, being a Work Buffer parameter, will be imposed on other
keyframes as they are inserted, unless turned off in the Source Hold menu.
You may want to start an effect with a Source Hold, so the existing sources
will not change when the effect is recalled, then turn it off to enable source
changes during the running of the remainder of the effect.
To Set a Source Hold in an Existing Effect:
1. Locate the cursor on a keyframe in the effect where you wish to add a
Source Hold.
2. Select the buses you wish to hold by touching their labeled buttons on
the Source Holds menu so their green indicators illuminate.
3. Press Modify or Insert to add the Source Hold to the effect.
The Source Hold only applies to that keyframe, meaning the previously
selected sources on the chosen buses will be held at that keyframe until the
next keyframe lacking a Source Hold is encountered.