Datalogic Matrix 120 Product Reference Manual page 143

Multi Image Acquisition Settings
Alternatively a hybrid configuration can be made where more than one Image
Setting can be grouped into an Acquisition Sequence by dragging it into the
desired Sequence box. Select the empty Sequence box and delete it with the
delete key.
Each Acquisition Sequence can be activated exclusively by a single event, either
through a string from an available communication channel or by a digital input.
Product Reference Guide 129