Martel Electronics DMC1410 - Manual (Page 99)

9.10 Group Configuration Details
The display contains two lists. The leftmost contains all available
tags which are not presently members of the group. The rightmost
contains the present group members. All tags which are members
of the group must reside in the same directory as the group.
To add tags to the group, highlight them in the available list and click
the right arrow. To add a single tag, double click it.
To remove tags from the group, highlight them in the group list and
click the left arrow. To remove a single tag, double click it.
Multiple individual tags are selected by holding down the Ctrl key
and clicking on them one at a time. Multiple contiguous tags are
selected either by clicking on the first and dragging to the last, or by
clicking on the first and holding down the Shift key while clicking on
the last.
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