Grass Valley iControl V.6.02 - Manual (Page 156)

Logs
Filtering a Log Search Using Multiple Criteria
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The selected choice appears in the Selection list.
4. If you would like to select all available choices, between the Choices list and the Selection
list, click the double-arrow pointing toward the Selection list ( ).
Note: Perform these two sub-steps for each choice you would like to select until
they are all in the Selection list.